Basically, most of the articles on chiropractic in SE say that chiropractic DOES work for back issues, but that their claims that they can solve other conditions (they used rheumatoid arthritis and high blood pressure as examples) were not supported at all.

There is, apparently, a small contingent of chiropractors out there who believe that chiropractors should stick to back/spinal issues and not make claims about other conditions, but they're in the minority, and greedy money-suckers, apparently, are in the majority.