Well, the working is not part of the question. it is an independent variable. The question here is asset allocation.
Sorry, I must not have made myself clear. I was not commenting on whether you should stay or go. I understand that your continuing to work is not part of the question. It is, however, an inseparable part of the answer.
The reason it is worth mentioning is that by continuing to earn you can build a larger portfolio than your current "High" target.
As others have pointed out, the AA is pretty much unrelated to the %WR a retirement portfolio will likely support over its expected lifetime. Whether it's 30/70 or 50/50 or 70/30 makes little difference. (I've learned that on this forum!)
But your question wasn't limited to asset allocation. You also asked about "moving the goalposts." The answer is "The action that moves the goalposts is changing the amount in the portfolio, not its AA. If you are adding to it (via staying employed), then already you are moving the goalposts."