Republican presidential candidate Newt Gingrich tonight repeatedly called for a massive overhaul of the federal personnel system during tonight’s GOP debate in Arizona. Said Gingrich: I agree generally with the need to reform government. I think that if we were prepared to repeal the 130-year-old civil service laws and go to a modern management system, we could save a minimum of $500 billion a year with a better system. A few minutes later, Gingrich returned to that theme, and asked, “What would a modern system be like? A modern system would be totally different. … It is possible to modernize…