Since the publication of Keynes's famous book in 1936, anyone taking any other approach to managing the economy can only be doing so to favor the rentier class at the expense of the consumer class. Keynes explains in indisputable terms why his approach optimizes the performance of the 'capitalist' economy, with sufficient consumption, savings, and investment and without imbalances in any direction.

For the nothing it appears to be worth, I have developed a monetary paradigm for the existing economic system that, with the befit of the passage of time, goes beyond Keynes's prescription.

if curious: "Neutral Money," here in Medium, but not behind the paywall (keeping in mind it is written for a general audience)