National pension is a ponzi scheme and as our population declines it will be impossible to pay it back.
With private insurance, you are given worse options and they will do anything in their power not to pay it. For the average person, you will also have paid more in the long run with insurance than without it, even if you had an accident.
Chiropractors are harmful for your body even if your issue is spine-related. Go to an orthopedist.