As Democrats prepare to take control of Congress this week, big changes are in store for Republicans. Not only will they be shut out of the legislative process, but they're also going to have to start working a five-day week.

While we're likely to hear a lot of complaining from the GOP on the broken Democratic promises about openness and bipartisanship, what Republicans ought to be griping about is the fact Democrats want to stick around Washington and do no good for five days instead of the typical three.

As Andy Roth of the Club for Growth notes today, "Last year, the stock market provided a return of only 2.25% on the days when Congress was in session. On the days when it was out of session, it was 11.56%. The historical returns are even more astounding (and there is causation with correlation)."

For all those Americans who complain about a "Do-Nothing Congress," just remember that when your member is back home in his district, he's actually doing you a favor.