Make airlines responsible for costs of medical care of healthtourists they carry

Whilst this would likely be illegal to do directly we can legislate to make the carriers of uninsured persons responsible for their treatment. As no carrier would want to face a bill of hundreds of thousands of pounds, it would be likely that they would protect themselves by making health insurance a mandatory term of carriage when buying a ticket and enforce this at the check in desk. This would effectively prevent health tourist before they arrive in the country.