The Friday File: To focus Congress on GDP growth, give members incentive pay. Pay them a base of $60,000 (median income) and incentive pay that rises with GDP. No bonus is paid until GDP growth hits 2%. Between 2%-3% they get a 30% bonus, from 3%-4% a 75% bonus, from 4%-5% a 200% bonus and from 5%-6% a 400% bonus. These incentives should see economic growth trump party purity.