Steve's barking free healthcare, is it used more then if you have to pay for it?

I just finished reading Think Like A freak.
One of the authors suggested to Tony Blair that it might be a good idea to have a voucher system for their healthcare system. With out going into specifics as what it entails, this is an illogical solution, that if implemented would do just the opposite as to what it is intended to do, reducing cost to the government. Of course sometimes my logic can seem to be totally illogical.

One of the suppositions in the book was that if you give things (health care in this case) to people they will misuse it. I turned the the pages over and over again looking for proof.
Because there was no poof that because healthcare is free ( though it's not free because it's paid by taxes) it would be misused by those who are getting free healthcare.

Now I propose a study in the US of at least 500 recipients of Medicare ( the last I checked, they don't pay a co- pay) against 500 of the poor who get their medical insurance from a job but have to pay a co-pay.
I would break this down still making 250 in each category workers, 250 non workers. 250 non workers getting their health insurance from their partners.
To be fair the numbers should be triple what I'm suggesting in the same group under 55, in the same zip code, half with children, half without. This would reduce variance.

What can't be judged from this study, if some believes tag they have paid for this healthcare insurance  
are they compelled to use it more.

I noticed at parties when there is left overs people rush up to bring as much food at home as possible.
This is not the same as being in a doctors office for a half hour to four hours.