When congressional Republicans try to figure out how to avert cuts in defense spending, or offset the cost of an extension of unemployment insurance, it is often federal workers they look to for the money.A dispute over making federal employees pay a bigger share of their pensions was one snarl that delayed the bipartisan accord announced Wednesday night on a bill to extend the payroll tax cut, continue unemployment benefits for long-term jobless people, and avert a 27 percent cut in payments to doctors serving Medicare patients.For months, Republicans have been pushing bills to reduce the federal workforce through attrition. Republicans point out that since 2007 the federal workforce has grown by 14 percent, even as the recession decimated private sector jobs.http://nbcpolitics.msnbc.msn.com/_ne...workers-to-pay