science

Not to demoralize you, but it seems a pretty stupid solution. First because you need to implement it world wide to hope to have some effect and second simply because this way nobody will ever try to go over the limit so your

This would absolutely fund UBI, and climate change solutions.

will get exactly 0 funds. So the guy that have 100.000.000 $ in personal wealth is still rich and you don't have any other resource for your UBI or whatever thing you want to do with them.

It is what is happening here were we have a lower limit to pay taxes, if you earn less than that you don't pay taxes (or a very small amount) and people simply avoid to go over the limit. BTW, the limit was introduced exactly with a similar reasoning, even if for different reasons.