The bill Republican leaders are trying to ram through this week without hearings, without time for even a basic analysis of its likely economic impact, is the biggest tax scam in history. It’s such a big scam that it’s not even clear who’s being scammed — middle-class taxpayers, people who care about budget deficits, or both. One thing is clear, however: One way or another, the bill would hurt most Americans. The only big winners would be the wealthy — especially those who mainly collect income from their assets rather than working for a living — plus tax lawyers and accountants who would have a field day exploiting the many loopholes the legislation creates.