A new study by a former head of the Congressional Budget Office says that ObamaCare would make dropping employees’ insurance the sensible choice for the employers of up to 35 million workers — with the workers’ concurrence. These workers would flood into the government-run exchanges, which would then cost about $1 trillion more than projected over the next decade — essentially doubling ObamaCare’s published price and leading to massive new debt. Once in the exchanges, workers would find that their upward economic mobility would be strongly limited by the exchanges’ extremely high effective marginal tax-rates.