Uh. We already pay sales taxes anyway. With no income tax, money to buy shouldn’t be a problem.
There will be an income tax. And the sales tax will be in addition to that and in addition to existing sales taxes, So if you're currently paying 8.25% as I do then you will be paying 17.25%. If you weren't paying much in income tax as many people aren't you will suddenly be paying considerably more. That's a tax increase by any rational definition.