As someone with a family member suffering from moderate Crohn's disease and frequently needs to utilize public restrooms this has obvious appeal. While I cringe at the thought of them paying every time a bathroom is needed out in public, the safety net would be great. It also would allow people who are very sick with Crohn's to venture out of their comfort area.

One thing to consider, in the US many states have instituted "Ally's Law" where businesses are legally required to allow people who need immediate restroom access, assuming it doesn't put the business or person in harm's way.