@birkenator @alper @babaq @MostlyHarmless no that's not the point.
If you earn $20k per year you might pay very little income tax right now. But you have to spend everything you earn on housingl/food/bills etc. if there is VAT on all of that then you pay VAT on everything.
If you earn $500k/year you don't need to spend all of that on housing/food/bills and can save it instead. You would pay zero VAT on the saved money.