Do we need fire departments? Do we need police? Do we need health insurance? If your home is on fire, why should the rest of us pay tax money to maintain and staff a fire department when your house is burning? You should pay a private company to protect your house if it should catch on fire. The rest of us do not want to pay for your problems. 

If your house is broken into and you are robbed, you should have to call a private detective to find the perpetrators and get your stuff back. Why should the rest of us pay for your problem? If you have a heart attack, you should pay for the cost to get you healthy again, and the rest of us should not have to pay for your problem.