The culture doesn't enable the money. Historical reasons going far beyond that explain it very well, among them: the size of the internal American market, the amount and ease of investing capital within the US, leverage of the US government's global projection of power by its industries, ease of immigration (prior to this past decade's immense increase in difficulty for migrating legally for skilled migrants), etc etc.
It's true that just swapping people places right now would not substitute anything. But you can bet that the immense natural resources, available land and influx of immigrants through the 20th century have impacts as much, if not more, important than whatever contemporary cultural trends exist.
Natural resources don't guarantee success; conversely, lack of natural resources does not guarantee doom. Russia and Brazil on the one hand, and Japan and Britain on the other hand, tiny island nations, relatively speaking.
Culture has a lot to do with it. Brazil had the immigrants (and still does have LatAm immigrants). On the other hand Japan has been very averse to immigration.
It's true that just swapping people places right now would not substitute anything. But you can bet that the immense natural resources, available land and influx of immigrants through the 20th century have impacts as much, if not more, important than whatever contemporary cultural trends exist.