It's worth noting that Ryan's own budget plan in 2011-2012 actually kept some of the law's cuts to the growth in Medicare spending. (In 2012, the Romney campaign argued that the ACA double-counted the savings — both to extend the life of the Part A trust fund and pay for other aspects of the law — and that it was a "raid" on Medicare. But, as we explained, that's how government accounting works: After Treasury issues a bond that it will have to pay later, it can, and often does, spend the money it received on other things. Whenever Medicare wants to cash in trust fund bonds, however, Treasury must pay them.)