All those queued-up college students and bike messengers would stop their early-morning moonlighting outside congressional committee rooms if Sen. Claire McCaskill gets her way.

The freshman Democrat from Missouri introduced legislation Wednesday that would require lobbyists to file forms declaring that they had not paid anyone to stand in line for them on Capitol Hill.

“This is not a private enterprise; this is not a concert; this is not an entertainment venue. This is a democracy,” McCaskill said.

It’s a “pretty lucrative business and is easy money,” said Beth Fowler of Washington Express, who would be on the losing side of McCaskill’s initiative.

Clearly, lobbyists wouldn’t be happy if they had to show up three hours before a hearing to guarantee a seat. And their clients wouldn’t be happy if they had to pay, oh, $650 an hour for a lawyer to stand in his own line instead of the passed-through cost of a $60-an-hour substitute.

But this Congress has been all about building walls between lawmakers and influence peddlers, and this would be one more step, right?

Not for the never-shy-about-ethics-issues folks at Common Cause. Spokeswoman Mary Boyle said her group “does not have a problem” with line standing.