As a Republican all of my life, it astounds me that the top 10% have convinced the majority of Americans to believe such a lie.
Sales taxes are not fair, they are regressive. I know you'll follow up with "rich people buy more and buy bigger stuff so they pay more!" Just realize that poor and middle class can not save as much of their income in the bank, but spend the majority of their income on must-haves. You mention all but food, but there are a LOT of other must-haves to function in America.
Computer, refrigerator, proper clothing, internet connection, electricity, water, etc. etc. etc.
If you spend 80% of your income and are taxed at 8%, you pay a MUCH higher percentage of your income than a 10%er who can EASILY afford to sit on 40% of their income.
Now you'll be tempted to say something about needing to save, work harder, boostraps, and all. The deck is stacked against anybody making less than $120k, these people (i.e. lets face it everyone posting on this thread) don't deserve more trump cards being given to the other guys.