One thing that strikes me as a bit off is that there are a massive amount people that are "retired" but want to work. While I get that basic income is intended

One thing that strikes me as a bit off is that there are a massive amount people that are "retired" but want to work. While I get that basic income is intended for a segment of the population that's able to work, seems like including a massive segment of the population that's already receiving basic income via social security AND wants to work would provide a lot of data for just the cost of measuring it; meaning the basic income is already covered.