I doubt whether it would be necessary to tax much else, actually.
Systemic Fiscal Reform
is an interesting site. "Any economic unit can emit money. The serious problem is to get it accepted" Hyman Minsky
And inheritance should be taxed too -we need something with a redistributive effect.
On the other hand, labour need not be taxed at all (though income should be -we need automatic stabilisers in the economy). Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi
