It's still quite a lot of money, but I think the basic assumption with a guaranteed income is that it would be accompanied by a tax increase such that net incom

It's still quite a lot of money, but I think the basic assumption with a guaranteed income is that it would be accompanied by a tax increase such that net income is neutral for some percentage of the population. Taking the extreme example where no one's net income is decreased and people below median get the full $10k net, you've already halved that number. I think most formulations of actually paying for such a guaranteed income would include some degree of reduction as you approach median and increased taxes at the high end of the income spectrum, further reducing the cost. As mentioned exhaustively, you also can subtract the cost of many of the pre-existing social programs because they get replaced by the guaranteed income.