Siouxrose, Medicare and Social Security are public insurance programs. You pay FICA taxes. FICA stands for Federal Insurance Contributions Act.
The beauty of public insurance is that premiums are not subject to free market decisions made by capitalists. I recently had lithotripsy for kidney stones. I was in a Urology Surgery Center (not a hospital) for about two hours and went home with a prescription for pain pills. My total bill was $22,000. Medicare paid the Medicare-Approved amount: less than $5000. Now that is cost control because the $22,000 is what my urologist would have been paid had I not been covered by any insurance at all. Private insurance companies negotiate costs with doctors and hospitals in the free market. Medicare tells doctors and hospitals what it will pay them, preventing capitalists from gouging people. Have you heard of the scandals in the cost of prescription drugs? Medicare Part D (prescription drug coverage) is just like the ACA, you buy private prescription drug coverage. The cost of meds is not determined by Medicare. Big pharma and big insurance negotiate the cost of meds. They win and we lose. That is the story of capitalism.
My Medicare Part B premium can never increase unless I get a COLA in my Social Security benefit and the size of the increase can never exceed the size of my COLA. No COLA in 2016, so my Medicare Part B premium is the same as it was in 2015.
I also have Blue Cross Supplemental Insurance (it pays my deductibles, co-pays, and the 20% of my medical bills Medicare doesn't pay. My Blue Cross premium is higher than my Medicare Part B premium and Blue Cross jacks it up every year. They tell me that this is because I am more expensive to insure the older I get. DUH! Older people require more medical care than younger people because your body wears out as you age.
My prescription drug coverage is through Humana, not Blue Cross. This is because Humana premiums are the cheapest. Why is this the case? The cheapest Humana plan is called Humana Walmart. If you choose to use Walmart Pharmacy, you will pay the least amount for your drugs (i.e., you can choose to go to Walgreens, but your meds will cost more). The wily capitalists at Humana and Walmart realize that if people have to enter Walmart to get their meds, it is highly likely that will buy other things at Walmart.