Time and time again we see waste in government. Budget requirements that make you spend or get your funding cut. Systems where the actual service rendered is dwarfed by the bureaucracy. Common sense tossed aside for group by in.
Insurance companies themselves are pretty ponderous and lacking in efficency. So why would anyone want government to run healthcare?
Right now most healtcare is this:
I'm going to pay you money every week at some point I have to go to the doctor and you will pay for it out of the money I have given you. You keep the rest of the money for this service. You will have to fight with the doctors so they do not do stuff or bill stuff that isnt needed. Oh, and you cannot say anything to me about my own personal habits or health.
With Government it would be something like this:
We are going to take your money and determine who gets paid for healthcare.