I've been convinced lately that we have no collective agreement about what the term "capitalism" means any more. Yes there are text book definitions but none of those are used in typical public discussions like HN.

Power tends to accumulate when government actions restrict voluntary trade that would have otherwise proceeded. That is a characteristic of governments not of "capitalism", IMHO.

There is no clear line between government and business in a place where spending money is protected speech. Much of the US government at all levels, but especially state and local, is fully captured by private interests.