When I worked for a corporation, everyone in the company couldn’t take their vacations at the same time. Why? Because the company had business to take care of. Why does the most important company in America shut completely down? Bravo to the individuals that want to get the business of the nation done!
Most corporations aren't characterized by the opposition politics which are so much a part of Washington. If a few Republican Senators were on vacation out of reach of Washington while the Senate was in session, do you really doubt that the Democrats would exploit the opportunity to pass legislation they otherwise could not?