I don't really care what The Founders thought about anything, but since people love to do that, I suspect that when they came up with this "election every 2 years thing" they didn't expect that being in an election year would be seen as an inappropriate time to do stuff in Congress because it would be political, or because the next team might be different, or any other weird shit like that.
Can't do politics in a politics year! Might be political!