make the useful idiots germans join
That's the problem. You are advocating forcing people to act as you want them to. That is not freedom.
Freedom is allowing the market to give them something to care about. Allowing profiteering from curation rewards shows how this works, by creating incentives that have nothing to do with actual content to promote curation. When people gain upvotes for forthright speech they have a reason to care about forthright speech.
The problems of profiteering, circle jerks, spam, scams, and plagiarism, are all examples of how bad incentives are coded into Hive. A plutocracy creates incentives to seek money above all else. This deranges economic systems that we should want to float all the boats in the community, rather than rewarding pirates to take everything they can.
Hive needs to code incentives better, and eliminate incentives for malign action, like profiteering or pandering.
"...imagine that we need to give good incentives..."
This is the solution to all the problems we face. We need to support free speech, and particularly criticism, because that is what makes free speech valuable to society. When we properly code incentives into Hive, we won't have to pay people to suppress bad actors, because people will defend Hive to defend their benefit from it.
People that gain nothing from Hive have no reason to defend it, so they don't. That is the problem.