how does the ryan plan for medicare and social sercurity work?

[bumper55706]

According to what I hear if your 55 years of age and older, social security and medicare stay the same. If you are younger then you will be switched to a stock market investment plan for your retirement. So if your 54 you lose your social security and medicaid benefits and make it up in less then 8 years by building up a new retirement in the stock market.What happens to the money's taken out of your paycheck which you've paid your entire working career do you lose it? I'd also be worried that another bernie maddoff would be handling my account. Also our economy is cyclical going up down in the stock market and the economy so what if you invest in a down period over your life time will you get the same or less because of the economy?