Politicians like votes more than money. If this is seen as the standard change of hands that happens once in a while in a good democracy then the charge will stay because $$$. However if this is seen as a rejection of the charges they will go away to prove your vote for the new people wasn't wasted. Seen is the key here - while surveys and such influence this, there is emotion there as well. Note too that it only needs a small vocal percentage in some cases to change perception.