To badly quote Joseph Stiglitz- 'The reason the invisible hand is invisible is because it isn't there'.
I would agree with that observation so when people start to invoke the 18th century market philosophy (usually incorrectly) you've gotta ask yourself what's their angle. Are they sellin or proselytizing?

I would like to see more 'democatize the enterprise' backed by government regulation.

Roosevelt was no fool and understood his class better than most. He understood bankers and kept them out of Bretton Woods. Knowing the psychopathic tendencies of wealth and it's eventual accrual of economic and political power he may have thought that a second bill of rights would provide a bulwark against that power and maintain stability.
Unfortunately, it didn't happen and things have deteriorated since by every reasonable measure. Yet somehow 'invisible hand' is still around....