I would love for someone to explain how keeping the pricing information away from me, for weeks or months equates "Informed Consent"? Because if I would have k

I would love for someone to explain how keeping the pricing information away from me, for weeks or months equates "Informed Consent"? Because if I would have known the price, I would have chosen not to "consume" the services. I would love to see a lawsuit based on this very area, with complete lack of informed consent with regards to cost and health benefit. Because the way it's currently handled is like if I went into a Walmart, loaded up with lots of stuff, and walked out the door. Then 3 months later, I get letters saying I owe X*$1,000 on threat of all sorts of things (garnishment, lawsuit, etc).