@The Czech - I hope you saw where I suggested making necessities (like TP and paper towels, food, milk, juice, etc) tax free. And we could even declare some foods (like pop, filet mignon, snack foods ala potato chips and Little Debbies, etc) to be taxable.
As far as other things like housing and cars, Bill and Melida Gates aren't going to buy something like my wife's 2007 and my 2008 Jeep Liberties anymore than her or I would buy something like the blue collar factory worker's 1995 Camaro or his wife's 1990 Chevy Minivan (just an example) so there will be an increased sales tax on the valuation of the car(s). Likewise, the factory guy and his wife probably aren't going to have a $250,000 home and Bill and Melinda's house is clearly worth way more than that. Again, the sales tax would be different.
But the real key to any taxation plan is to not have deductions beyond very basic ones that are identical for everyone so the poor get a break, relative to their income, greater than the rich. In short, all disposable income is taxed equally, and all investments not turned into income are taxed equally. I am a firm believer in property taxes even if I bitch about Kentucky declaring cars as real property that are taxed on there value every year. $475 a year for license plates on two cars... Geez!