or, maybe:

reality-shaping power
(concrete) power in the real world


Simmel is convinced that through the money form, individual freedom is potentially increased greatly, but there are problems of alienation, fragmentation, and identity construction.

In this context, the positive energy of money seems to be emphasized, in physiological terms, its effects on things in existence.
It's seen as a life force (Lebensmacht) a force that shapes reality, that is the essence/catalyst of all things real.


its "power to affect/influence reality" (society/ life) - - would be another option but not as strong. The "power to create reality" might be too strong, "too powerful," but it depends on the broader context.

I collected a few links that speak of this "reality power" of money according to Simmel.
Hope it helps for your context.


http://www.dissertationen.unizh.ch/2002/weberberg/disschwb.p...
Die Bedeutung und Wirklichkeitsmacht der Funktionslogik des Geldes im Kontext moderner Gesellschaft zeigt breite Auswirkungen, welche Simmel mit verschiedenen Begriffspaaren charakterisiert, deren drei oben dargestellt worden sind.Die breite Bestimmungsmacht, welche die Funktionslogik des Geldes auf die Wahrnehmung von Wirklichkeit besitzt, bedeutet nach Simmel, dass Qualitäten quantifiziert werden, dass Zwecke zu Mitteln herabgedrückt werden, dass personale Beziehungsunmittelbarkeit und relative individuelle Unfreiheit gegen individuelle Freiheit und eine Vielzahl vermittelter Abhängigkeiten getauscht werden, dass sich letztlich eine kulturelle Tragödie ereignet, welche die Subjekte unter die kulturellen Objektivationen zwingt.Die menschlichen Subjekte verlieren ihren unmittelbaren Subjektstatus, indem sie im Hinblick auf die Teilnahme an den gesellschaftsbildenden Prozessen faktisch gezwungen sind, ihre Wahrnehmung und damit die für sie relevante Wirklichkeit der Funktionslogik des Geldes unterzuordnen. Es gehört zum Charakter der Geldlogik, diesen Umstand wirksam zu kaschieren.

http://www.cjsonline.ca/pdf/simmel.pdf
To bring this back to the sociological theory of value, Simmel articulates an immanent critique of the money economy by showing how money as essentially a medium of exchange becomes reified, valued for itself and the power it provides, and then expands limitlessly beyond all bounds (given by the forms of sociation) to incorporate potentially any production of human sociality (p. 222). The fixation on money disrupts the integrity of the forms of life and the process of cultivation which Simmel described as “the path of the soul to itself” (p. 219).


http://www.cas.sc.edu/socy/faculty/deflem/zSimMon.htm
Christoph Deutschman (2000), most clearly, has developed an alternative to a functionalist sociology of money by arguing that Simmel’s conceptualization of money as an ‘absolute means’ allows for a useful perspective of money’s role in modern society in relation to broader currents of individualization and modernization.
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http://garnet.acns.fsu.edu/~nr03/notes towards an anthropolo...
Georg Simmel (1978 [1900]) thought of society as an endlessly-proliferating network of exchanges (in other words, a market). He rejected the British attempt to base money on the objective certainty of a gold standard, since this reinforced a notion of money as something outside our individual or collective control. He saw it rather as a symbol of our interdependence, locating its value in the trust that comes from membership in society. Like Marx, he identified a parallel between the abstraction of money prices in commodity exchange and the abstraction of thought (scientific analysis) that represents the highest level of our cognitive interaction with the world.

http://www.socio.ch/sim/work.htm#A Note
When monetary transactions replace earlier forms of barter, significant changes occur in the forms of interaction between social actors. …
…It thus helps promote rational calculation in human affairs and furthers the rationalization that is characteristic of modern society. When money becomes the prevalent link between people, it replaces personal ties anchored in diffuse feelings by impersonal relations that are limited to a specific purpose.
Consequently, abstract calculation invades areas of social life, such as kinship relations or the realm of esthetic appreciation, which were previously the domain of qualitative rather than quantitative appraisals.


http://uregina.ca/~gingrich/simmel.htm
5. Philosophy of Money. Simmel's major work concerns money and the social meaning of money. In this book Simmel is concerned with large social issues, and this book can be thought of as on a par with The Division of Labour of Durkheim, although not as extensive and thorough as Marx's Capital or Weber's Economy and Society. In this book, Simmel is concerned with money as a symbol, and what some of the effects of this are for people and society. In modern society, money becomes an impersonal or objectified measure of value. This implies impersonal, rational ties among people that are institutionalized in the money form. For example, relations of domination and subordination become quantitative relationships of more and less money -- impersonal and measurable in a rational manner. The use of money distances individuals from objects and also provides the means of overcoming this distance. The use of money allows much greater flexibility for individuals in society -- to travel greater distances and to overcome person-to-person limitations.
Simmel thus suggests that the spread of the money form gives individuals a freedom of sorts by permitting them to exercise the kind of individualized control over "impression management" that was not possible in traditional societies. ... ascribed identities have been discarded. Even strangers become familiar and knowable identities insofar as they are willing to use a common but impersonal means of exchange. (Ashley and Orenstein, p. 326)
At the same time, personal identity becomes problematic, so that development of the money form has both positive and negative consequences.
That is, individual freedom is potentially increased greatly, but there are problems of alienation, fragmentation, and identity construction.

http://www.erudit.org/revue/meta/2004/v49/n4/009781ar.html
reality-shaping power:

Computer Translation
9

There is growing interest in the fact that translators willy nilly are learning how to take full advantage of the opportunities offered by the new entrepreneurial environment which is heavily interspersed with all sorts of electronic data-processing equipment. Seen in a long-term future-oriented perspective, the reality-shaping power of computer technology has become a predominant feature of electronically advanced societies. This process is accelerating. In former times, electronic data-processing could claim only one function, namely that of speeding up simple mental operations. Today, the computer is multifunctional, its overriding function being to act as the driving force in creation and innovation and to sustain the trend towards the electronic simulation of human activities, including translation.
10

After a sequence of fashionable ups and downs, computer translation research has taught us that, as a rule, and with the exception of highly standardized texts, translation problems cannot, at least not in an encompassing way, be solved by conventional algorithms. Translation problems must be solved by heuristic procedures that for the most part do not operate in a standard fashion. There is no intrinsic coherence between stimulus and response sequences. The solution of translation problems requires a fair amount of cognitive insight, but very little in the way of prior algorithmic knowledge.

http://unpac.ca/economy/moneydebt.html#1Money - seen differently:
http://unpac.ca/economy/moneydebt.html#1