Why do so many say Health Care can be less expensive?

I have a general understanding of Economics, I took a couple economics classes for my associates degree in general since two years back, and health care was never really brought up.

Could someone help me understand the economics of Health Care. Is it possible for it to be cheaper? If so why are we not making it cheaper?

Is there any books or articles I should read to deepen my understanding?

Ive seen arguments against like the insane upscale for drugs like Insulin a lot, but that's a about it.