Because the states' get a ton of Federal funding for roads, health care, defense, public safety, education, etc.
They got us by the nuts. We're too dependent on those funds to turn them down now. Specifically, in this very ruling, it stated that states can be denied future Medicare and/or Medicaid funding if they do not comply.
And this is what pizzes me the hell off, and specifically what I think will cause our downfall. Why don't the states just fly the middle finger :finger: to the feds and keep the money at home? Quit paying into the .gov teat and quit consuming from it, seems justifiable. Lord knows the states can utilize it better and more efficiently for their individual needs.