I found the following information to be interesting in that regard.
EvMick
A MEDICARE MUTUAL INSURANCE SYSTEM
A mutual insurance model for a new Medicare system is proposed by 
Sen. Phil Gramm (R-Texas), and Texas A& M University economists 
Andrew J. Rettenmaier and Thomas R. Saving in the New England 
Journal of Medicine.
They propose that over a 50-year transition period, Medicare be 
changed from a transfer payment system to one in which each age 
group -- defined as all the people born in any given year -- 
would contribute to an investment fund to pay for the health care 
needs of that group in retirement.
   o   Workers in each age group would pay a set percentage of 
       their wages throughout their working lives for health care 
       in retirement.
   o   The annual cumulative funds collected from each age group 
       would be divided equally and deposited in each person's 
       account to grow until retirement.
   o   Investment account providers would be subject to 
       reasonable requirements with respect to the safety and 
       soundness of their portfolios and required to take all 
       applicants.
   o   If a person died before retirement, his contributions 
       would be redistributed to other members of the respective 
       age group.
As each age group moves through its life cycle, the contribution 
rate would be adjusted to take into account changes in 
experience, just as other casualty-insurance rates are now 
adjusted.
Since all workers in an age group would pay the same tax rate, 
workers would subsidize nonworkers and high-income workers 
subsidize low-wage earners.
Funding the transition cost from the current tax transfer system 
would have a present value cost of about $1.4 trillion, say the 
authors, compared to unfunded liabilities under the current 
system of $2.7 trillion.  Workers 43 and under would be fully 
covered by the new system -- initially paying a higher tax rate 
to help fund the Medicare benefits of current retirees and older 
workers.  
The contribution or tax rate on younger workers would fall for 
each age group as they accumulated enough funds to pay for their 
retirement medical expenses, and the cost of funding 
benefits for a shrinking pool of retirees under the old system 
fell.
Source: Phil Gramm, Andrew J. Rettenmaier and Thomas R. Saving, 
"Medicare Policy for Future Generations -- A Search for a 
Permanent Solution," New England Journal of Medicine, April 30, 
1998.
For more on Medicare 
http://www.public-policy.org/~ncpa/pi/health/hedex7.html
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