The Democracy of the founding fathers was Greek Democracy, predicated upon a slave society, and restricted to only the elite. This is the society we live in today, even with our reforms towards direct representation. The system is inherently biased towards the election of elites and against the representation of the masses. Hamilton called it “faction” when the working class got together and demanded better conditions, and mechanisms were built in (which still exist to this day) that serve to ensure the continued dominance of the elite over the masses. The suffering of the many is intentional. The opulence of the wealthy is also. This is the intended outcome.
When you place economic decisions from a profit driven one into the hands of the politician, you get just as perverse incentives. What's even worse is that the government cannot fail so the system just gets progressively worse until the entire system collapses. I'm good with a liberal system as is with some moderate reforms to account for externalities.
I will just copy and paste part of my comment that I made to another, because your final argument is the same.