What's the sense Borrowing from Zhang just to pay Li? That's meant to rob Peter to pay Paul
If you are in the English classroom to prepare for the math test, it is rob Peter to pay Paul.
Pay me now or pay me later, don't rob Peter to pay Paul, and so on, you've heard it all before.
What's the sense in borrowing from Mr. Zhang just to pay Mr. Li? That means to rob Peter to pay Paul.