In such models where individuals in a market system can influence public/private institutions for their own interest (news organizations, private think tanks, lobbyists, public/private colleges, corporations, charities, nonprofits etc etc) will be able to reroute those institutional resources to gaming elections — which is unavoidable result over the market’s long run, similar to it being impossible to defend one’s currency against speculators over the long run — thus selection pressures force politicians and political institutions to either cater to these wealthy people’s whims and the institutions they control, or to somehow (and very unlikely) bare the selection pressures that are pushing them out of office.
Given the law of large numbers, you’d presume at any point the average legislator would be captured more by these maladaptive selection pressures rather than somehow existing in spite of them.
As democracy is eaten away, we will maintain a slow decay to a Russia-like sultan oligarchic system and the comforts the majority currently maintain will slowly go with them.