I agree. If you don't have money set aside for RRSP contribution, then it may work to your benefit. But, I think you are putting yourself in a long process if you do the TFSA > RRSP > TFSA route. If you have extra cash set aside, it's wise to use it directly, to top up your RRSP and TFSA, and try not to withdraw from it, if possible.
Also, I believe TFSA has withdrawal fees!?? You may end up losing more then saving...
