@Luis_Fierro Why is means testing better than income taxation as a way to recover the cost from people who don't need it?
The drawback I see with any means testing is that it tends to have a sharp cutoff, which risks trapping people in unemployment.
A tapered cutoff at X% of the person's income works out to the same thing as a marginal tax rate increase of X%. Letting people keep the UBI while working is what incentivizes work.