No one wants to work because unemployment pays better than working and everyone knows if inflation gets too high they’ll literally just send out “stimulus checks” again,

Most people really don't want to work and want to have some income. Not a good thing, but that is how it is. So, they are glad to have money from government. That is what modern world teached them for a long time on the examples of elites or/and state officials.

Without total unbrainwashing (could I say so), all that people will be happy with UBI and will obey anything that government will tell them. Of course, some of them will become bored after some time and will try to get out from that vegetable existence, but I doubt it will be many.

And I even can't imagine how that unbrainwashing could be done on that scale for americans. There should be some basic American things (IDK, traditions, something cultural, religious - not an American, so can't tell) that could be a base for that repair, but what if that things are destroyed too?