Take their wealth out of hand, and you lose the ability to motivate people towards a personal reward (why would I work my arse off, if the government will just reposess everything later?).
There is significant evidence that this is not actually true, unless you really do repossess EVERYTHING. And even then it's only true for like 2/3rds of the people.
turns out most of them do it for the power and prestige, and while the wealth is a good way to flex that, if yo take the wealth equally from them AND their peers, they aren't made significantly worse off by it.
Its the same quirk of human nature that makes unemployment such a bad thing - we are greedy bastards, but most of us don't base our happiness on
stuff so much as on what stuff we have compared to prevailing cultural norms and how much stuff we had yesterday. We are surrounded by appealing narratives, and we need money to buy in.
And employers don't want to deal with people with a low commitment. They don't want to manage 30 employees for a weeks worth of work instead of two. So even if the actual necessities are much less than people think they are, its extremely difficult to only earn that much money. It's not efficient, so there's pressures on employees not to offer it if possible. If it's an hour or two a day, there are pressures, via time lost to commutes, not to work it on the employees part as well. And people like having extra money around, for emergencies, or because they can always find a use for it.
Oh! And we spend a lot of money on minimizing risk. In fact, huge swathes of our economy are dedicated to it. Many risks that we used to simply accept, we can't justify any longer because there ARE ways to mitigate them.
All of this means unemployment is bad, and there aren't any easy solutions.
Persoally, I'm a big supporter of a negative-income-tax variant. But again, this might just be greed talking - I was most happy when I was homeless, and I've calculated that I'll need about a hundred thousand, AFTER paying off student loans, to live happily that way for the rest of my life. Which is quite a bit, and about half of that will be dedicated to fighting, bribing, and avoiding police officers (who are, by far, the worst part of being homeless, and dealing with them can get pricey). An NIT would mean I wouldn't have to do that, and I could just dedicate myself to making games and whatnot for people to enjoy.