Here in France lots of the taxi companies have got a "seated medical transport" licence. I guess the drivers get some formation (they need to have a first response certification), the taxis are licensed by our NHS equivalent, and you get all or part of your money back as you do when you pay at your GP or hospital. It's used for example to go to the hospital to get you in and out for a surgery, chemotherapy, consultation etc... This cancels the "ambulances are free, taxis aren't" argument.