"The people who had hoped" is in the pluperfect tense (or as you put it, "before the past") However, this is academic because as they were hoping it must have been for something that at the time had not happened. (You cannot hope for something that has already happened). Therefore, they must have been hoping that it could help .
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AnonymousGoodman, shouldn't your sentence in your response be this?It's seems to me that you are right. However, practice doesn't always correspond with theory.
I think I could get the proposal done if you give gave me till 5 pm.