Zambonic.
In short the people with the smallest incomes spend the most on essentials. If all things purchased are taxed then those who are closest to living check to check will be the ones who pay the most in taxes and will have their lifestyle changed the most by having to pay such taxes.
So how come the millionare only spends 1/10 of his income on taxable goods, where as the person making $50,000 spends 50% of his income on taxable goods?"
Because he doesn't have to spend all of his money just to survive.