Lest you forget, cruelty is the point, no matter what they say.
They don't care about taxes "being used correctly," because they are sitting on one of the biggest slush funds in the entire US, and they couldn't possibly be bothered to actually use it to better the lives of Texans. /s
ETA: These kinds of guaranteed income programs always work, no matter where they're deployed. $500/mo isn't enough for anyone to just grift off the system for long at all, and most want to be self-sufficient anyway. If the point or effect of poverty programs isn't to pull people out of poverty, then you're doing it wrong (or in the case of Conservatives, the system is working as intended).