> The tax experiment I'd like to see is a very progressive sales/VAT tax that exempts certain used goods, essentials (groceries, etc) and hits luxuries, sin tax (that burden public healthcare) hard.

I'd like to see this, too, but all you'd get is companies constantly bellyaching about why is my essential product considered a luxury?? And lobbying to get them on the low tax list rather than the high tax list. Every company is going to have their little excuse about why their product isn't really a luxury.