> One easy test is how they feel about sustained high profits. To people who value markets for their ability to drive improvements through competition, that's a sign of something wrong, like insufficient price competition.

We'd need more context. Those sustained profits are "money on the table". There may be real advantages to the company earning them, like sustained innovation or other quality, that others have trouble competing with. But if those profits are coincident with lots of lobbying and various shenanigans (controversially maybe including patents and copyright)... you'll get more sympathy.