> Obviously there are many practical issues with this, namely that it would require way more and detailed data on purchases than anyone has and would be complet

> Obviously there are many practical issues with this, namely that it would require way more and detailed data on purchases than anyone has and would be completely politically infeasible. And the fact that a lot of people don't have any money right now, and haven't made money since March, and don't know when they will be able to make money again.