If you're poor, you certainly don't have very much discretionary income hence the net rate you pay would be less.
NRST taxes every penny of consumption, it just rebates back the poverty level worth of taxes which is far less than my non-discritionary spending.
So, it will take less from the poor, and take less from the rich....
Just WHERE, oh Houdini, is the REST of the money going to come from? A monkey's butt?