On shirking:
This guy always wants to shirk. He's a lazy bastard.
On algebra:
Before we start doing enough algebra to make your noses bleed, are there any questions?
On the direct revelation mechanism:
So this is what you get, and give me all of your money. The only other option is for the consumer not to wake up in the morning.
And one last one:
Did I do this right? Aha, this is all correct but completely irrelevant.