Sometimes. Other times you are charged what you can afford. Adding to the problem is that we often do not pay directly for goods and services. A third party picks up the tab, an insurance company, or an employer. No wonder my dentist and primary care physician like to see me so often. No wonder I go along. The care providers can overbill quite outrageously while all it costs me is a measly co-pay.
Imagine how much an oil change would cost if routine maintenance were covered by 'auto care insurance.'