Not everyone can get a higher paying job, even if they wanted to. Why should you depart from the property you have already earned while at the same paid high taxes just because you happen to have a bad patch in your life at the moment?
In June 2009, about 500,000 people more we unemployed in the US and the unemployment rate was 9.5%:
http://www.bls.gov/news.release/empsit.nr0.htm
Do you think that all those half a million people just chose to quit their jobs? I know the unemployment rate in the US has been below 5% sometimes. Have the Americans become more lazy?