in aus i think we dropped sales tax in place of the gst(goods and sevices tax)so then prices went down(or stayed the same)then 10% was stuck on top,were used to it now(dosent mean we like it)some prices include gst some dont,depending on the item,in the 80s we had a fbt(fringe benefit tax)for example if you got a company car and phone account you paid tax on it.i was going to fart but couldnt afford the (fkcu all related tax)