The kind of person who rises to the top in Socialism, is the kind of person who is very, very good at the backstabbing kind of office politics. Meanwhile, capitalism tends to require that you be good at getting useful things accomplished.
This is one reason why academics love socialism.
This sums up Clinton and Trump.
Clinton had no accomplishments and was not good at anything -- but she was a fearsome bully who would walk over anyone's corpse to get to the top.
Trump is a billionaire real estate guy from NYC. Getting useful things accomplished? Yeah, he knows how to do that. I often observe that the real estate guy does politics far better than any of the professional politicians who have been in DC for decades. Trump actually knows how to get things done.