And, of course, there are other ways to be financially responsible, saving, and other insurances one should have. One of my students dropped out of their Ph.D. program because he did not get the insurance on a rental vehicle which got stolen--and he was stuck with the cost of the car.
Rather than a mandate, citizen juries could look at each individual and determine whether they are being financially responsible. That includes the combination of savings and insurance as well as investing in one's own business and one's education. I think one would have more sympathy for the person who uses the money they would have paid for premiums to pay for a college degree in a field with good job prospects than those who use it to party hardy.