Also, I'd argue that capitalism is what causes the entrenchment of industries that get addicted to their profits and don't care about the customers.
No, this is human nature. People with power and wealth act to protect it. This is true whether they get their power and wealth because they are high-ranking politicans, party officials or bureaucrats, or whether they earned it in the private sector.
One uses money to manipulate the people in charge of socialist government programs. I'd bet that the dental lobbyists are stronger in their niche than the teachers union is because there's less public knowledge and interest there.
Given a few assumptions, of course - enough information, attentive enough government, enough energy in the society etc.