I think money is a poor substitute for capital in this analysis as money is needed as cultural chip to access either land, labor or capital.

Think instead of the tools, the machines, the workbenches and the assembly line of industrial production. As we produce ever more, we need ever more of resources to feed in (land), workers to man the machines (labor) and and machines (capital). Any one of these can hinder the growth of the production. Of course, production can be directed to build capital, but if capital is controlled in a few hands, that will not happen.

When speaking of non-industrial sectors, there are also ways to control capital, today intellectual property legislation in different forms seems to popular method, a couple of centuries ago guilds were the rage.

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