Being a little rich isn’t a problem. Being very to insanely to disturbingly rich, that is a big problem and should be removed as a possibility by governments. Tax the shit out of people until their riches reach acceptable levels
Capitalism is only anti democratic if left unchecked. It needs to be much MUCH more limited than it currently is. But you don’t want to remove it, capitalism is -unfortunately- the most successful way of running societies. Again, you want to limit the crap out of it and right now it’s just running in stampede mode which indeed will destroy democracies