The government has a vested interest in my continuing to live via taxes. The insurance company would prefer you die quickly. I would prefer not having to sue while I'm dying to get an insurance company to do what I paid them to do.
The government has no more concern for your well being than the insurance company, the government has the ability to simply create more money out of nothing. They do not need nor care about your taxes, your taxes is just a method of control and to provide some manner of legitimacy to their system on control.