Don't support the credit card oligarchy. Only shop at places that are cash only or put the credit expense fee on the users, not the people paying cash.
I 100% agree. The problem is that the credit industry exists (obviously) to make money for creditors. Their profit comes from a.) vender fees (that often just result in higher product costs), b.) fees to people who aren't stable enough to pay their balances before fees kick in.
Either way, the credit industry introduces a middle man that a.) artificially inflates costs to goods and survices and b.) financially burdens those who can least afford it.
Sure, credit serves a purpose to bridge a financial gap, like say buying a house, but I go in to that loan agreement knowing how much I'm going to pay for that service. Credit cards, on the other hand are just shady societal life siphons.