Sales tax is not a "new product" tax. It is a tax on selling goods in the marketplace. No, it is NOT double taxation. I get paid and I lay taxes on that. Then I go out and pay for services and goods and the recipient get taxes, that is not "double taxation on "used" income", it's a tax on income. The biggest loophole / unfairness imo is that there are no sales taxes on sevices, which is the biggest part of the economy. It is also regressive as the higher income and wealthy tend to spend a larger share on services (think lawyers, beauticians, spas, accountants, and yes luthiers and musicians). I would support reducing the sales tax to say 3% (compared to 8-9% on goods in California) and charge it on goods AND services, even thought it would affect both my income (as a lawyer providing legal services) and as someone who spends a lot on services. A lower, more broad based tax would have less of a distortive effect on spending, particularly as we increasingly have a choice between goods and services (e.g. buying a car vs car share).