@redhouse, i would not characterise it as emulation, i think that like a well regulated market the government can, no even must, act within the market.
So regulation biases the market in some way by placing costs on breaking the regulations (prohibition making it a large cost) and government purchase of health care can - if done correctly - still allow freedom of choice which is neccesary for a market system. That places the government as a customer, a part of the market who is making purchases in the interest of the public.
As such i actually object to Obiwan's description of the role of government - i think a minimal role results in a class division which hurts society and further biases the health care in such a way (if all the best doctors want to work in high paid positions) that the poor need more health care and costs for them are above average - this is a bad outcome for society.
I'm talking about community based incentives - so if an entire area benefits from less illness then all the doctors get a bonus. Thus the doctors interested in making the most should spend their time targetting the poor and least healthy.
Similar arguments could be made for housing - that living in a shelter actually makes it harder to find a job and escape from poverty. Thus government plicies like this have a negative impact on social mobility.
The poor need better quality or service and opportunity not worse.
The same argument could be made for education, food, or any other basic provision. Though the simple fact is i argue for a flat bacis income for all - thenn anything you earn on top of that is taxed, but you get to keep the majority of your hard labour. A simple system to ensure all people can afford the services they need and prevent them becoming a drain on society (whether that is their kids being difficult in schools, the crime rate associated with some people having more than others, or the health care costs associated with homeless people who are more likely to develop expensive chronic illnesses)
This is also a mixture of communist and capitalist. Free market controp of what is produced and who demands what, but a basic income for everyone to survive.