do you think the taxpayers should be on the hook for Crystal the stripper's boob job?
In an ideal world, yes. In practice however health services are too financially stretched for that. Breast reduction as an elective procedure? Certainly since it relieves pain, especially in older women and those who do very physical jobs.
It depends on the elective procedure; facial disfigurements or gastric bands yes, since facial issues can have a real effect on someone's psychological wellbeing since some people are really sensitive about things like that and it does affect things like self-esteem and interactions with other, and in the case of obesity, it affects their overall health, life expectancy and future health outcomes which may involve complex treatment later.
Hair transplant or teeth whitening no, not until we fund health services properly. One day though, why not do this in a developed society?