You know the basics. The unemployment rate is 9.9 percent. Jobs are still being lost. Worries about the global economy are causing breathtaking volatility on Wall Street. And millions of Americans who still have jobs are worrying more than ever about the safety of their retirement savings. What you may not know is that, during this moment of terrible economic anxiety, the Obama White House found the time -- and the money -- to turn itself, at least for a night, into a showcase of glitzy extravagance. On May 19, the White House held a state dinner for Mexican President...