That's not strictly true. You just can't get reasonable terms unless you participate.
Credit used to be much, much harder to get, and more expensive. You got loans from friends. You shopped at a particular store for years and built up your reputation before they would offer you credit. You pawned something. Or you just saved your money and paid cash.
Credit used to be much, much harder to get, and more expensive. You got loans from friends. You shopped at a particular store for years and built up your reputation before they would offer you credit. You pawned something. Or you just saved your money and paid cash.