You don't even need it to be that complicated. Just send everyone a check for $1000 every month and then taxes can be collected with a flat rate at the point of

You don't even need it to be that complicated. Just send everyone a check for $1000 every month and then taxes can be collected with a flat rate at the point of sale without needing individuals to even file a tax return. The checks create a progressive rate curve even with a uniform marginal tax rate.