Sales taxes are very regressive. A rich man ($200K) buys a car for his daughter, for 15K. He pays a sales tax of 10%, but buys the car for cash. Licence, title, registation, insurance, etc. All that adds up to 17,6 to drive away. A working women buys the same car and finances it, putting $1000 down, pays all the same fees and finances the balance, including the sales tax. She’s taxed twice because the sales tax is attached to her amount financed. At 6%, with no write off for the interest paid to the lender, she’s paying an additional amount to the lender on her sales tax. Without a write-off of those types of interest charges, she’s paying a hidden sales tax of about $700-900, or more, depending on the term of the loan. Or, it’s the state cost-shifting profit ( the interest ) to the lending institution. Now, that’s regressive as hell and is not deductible, under your standard deduction, because you get that for buying nothing at all.