It's hard to answer your questions without knowing what before/after pictures you have looked at or what surgeons you are referring to. I think that is a very significant generalization and misrepresentation of surgery abroad vs here in the United States. One of our biggest concerns here is patient safety, and we do not practice large volume liposuction in an ambulatory setting (where you go home after surgery instead of staying in the hospital) due to concerns of blood clots, dehydration and fluid shifts, and other post-operative complications. We often also take care of many complications suffered by patients who have gone overseas looking for inexpensive plastic surgery. In the end, this is your body, and you generally get what you pay for. Be very careful where and by whom you chose to have your surgery!
I think that is a gross misstatement. First, we have no idea whether posted before and after have been photoshopped. Second, in the US, we have much higher standards of accountability in terms of governmental regulation and malpractice risk which protect patient safety. Large volume liposuction is not permitted in New York based on morbidity concerns. Shopping for plastic surgery is not the same as shopping online for a dress that can be returned if you don't like the fit!