A gaping loophole in state insurance rules that lets freeloaders pick up coverage to pay for expensive surgeries — and then dump it once they’re treated — has cost taxpayers as much as $37 million a year, according to a study that warns the same wrinkle in Obamacare could add a staggering $2 billion a year to the deficit-wracked federal budget[Emphasis mine]. Exploiting a state provision that forces insurers to cover patients with pre-existing medical conditions, thousands of so-called “jumpers and dumpers” are buying plans just before major operations and procedures, and then chucking their coverage and passing those costs...