Bluemic:
Not commenting on the ethics of the situation. Answering your question and the answer is still NO, they were not seeking, nor could they seek, permission for anything.
Reiterating: A survey is not a platform for permission, but a method encouraging participation in reaching a consensus. This is fact, not semantics.
Possibly a better question may have been framed thus: "Is ACPA polling the membership for direction on how to solve the pension shortfall, one of the options involving retiree participation?"
I answered your question correctly as it was posed. To the question in the previous paragraph, I would have answered "Yes".
As you have likely read, there will be no proposal from ACPA that involves modifying retiree pensions. Unfortunately, it is likely out of their hands and in the jurisdiction of much less sympathetic powers.