Someone making $15k a year is working at a rate of about $7.50/hr. If he only makes $21k after being handed a free $10k, then the hourly rate must be about $5.50. You think minimum wages will go down to $5.50 instead of up? Really?
I firmly believe we cannot have a significant UBI and a high minimum wage. UBI is partially a replacement of the minimum wage and can probably only work with a drastic reduction of our current minimum wage. We probably won't actually reduce the minimum wage, but will gradually reduce it through inflation. I support raising the minimum wage today only because no one in power is seriously considering UBI, but I would certainly love UBI over a minimum wage.
Will it be more likely to be viable if that number is 300 million people "or so"? The recipients of UBI would be six times the number you talk about.
As I said in my original comment, the vast majority of people receiving UBI would have their taxes raised by an amount equal to or greater than their UBI payments. Probably only about 20-40% of adults would receive any increase in net income, similar to the amount of adults currently not paying any federal income taxes. And only those seeing a net increase of income would need to be subsidized by higher earners.
It is physically impossible for them to break even. Giving them $10k and then paying them $10k means they break even. Where does the money come for the 50% of households that pay no income tax currently? It has to be extracted from those who do.
That is exactly the same thing I said when stating they certainly would not break even. Other than to use more inflammatory language what was the purpose of typing this?