It is what you get when you get Social Security/Disability, yes a bit like the NHS but not for everyone... poor Trish can't get it because she is able to work.
You Really, Really, Really, have to jump through hoops to get it. And, it is not really all that great, but this Doctor and his clinic accept it and they actually do good work. Most Chiropractors are like slip and fall, and insurance case people, not all of them do decent work. This guy has found his niche and is able to get the government to pay for it. Hooray, otherwise it is just painkillers until you get addicted and walking hunched over forever.