Wow. She actually said it.

I knew that people were plausibly speculating that Democrats liked the “deem pass” option because House members wouldn’t have to go on record as having voted for the Senate health care bill

From the Washington Times

"It's more insider and process-oriented than most people want to know. But I like it, because [House] people don't have to vote on the Senate bill," Mrs. Pelosi told bloggers in a round-table discussion Monday.

There you have it.  For all the CYA talk about the vote on the changes being a vote on the bill, that’s what this is about.