at least five years of fairly stable fat loss, outcome-based evidence of improvement, and a reason to think that the improvement isn't from exercise and/or a low glycemic diet.

Gastric bypass patients are an example of a population where there is reason to think that the stable weight loss is due mostly to fewer total calories, and they do seem to experience positive effects.

Liposuction, on the other hand, does not seem to share this positive health profile. (Of course, the "fat loss" in liposuction is very location specific)