Malthusian nonsense. I wrote about why Malthusians are always wrong:
No, Tainter; and historic fact. Diminishing return on additional investment in additional complexity until the tipping point (vulgo:the end of the society).
That is socialism debt capital, not knowledge work capital. You conflate the problem with the solution.
You don't understand the role of debt. Debtless humans don't suffer from productivity gains. Debtless humans in the rain forests nearly live still the same life style as 100'000 years ago.
Productivity increase and output increase is the result of tax/tribute and its derivative: the debt/interest.
As Adam Smith wrote, landowners are the only stakeholders in a capitalist economy that don't suffer from productivity gains in the long run. (Read Smith's Weath of Nations for why.... it is public domain by now.) Stakeholders outside the economy will obviously not be effected by it (except possibly by pollution), so I don't really see your point there.
Now, whether or not what we have can rightly be called capitalism is another question entirely.