You can remove the unmerged match. Once it is removed you can suggest they be merged.
Caution is warranted. Did anyone post a reason for why they should not be merged? Sometimes there are clues in the message boxes on the profiles. Were they marked as rejected merges a long time ago? (several yrs) If they were recently marked as rejected matches, you should have a very kind dialog with the other pm. When I propose a merge, I offer to help clean up after and try to assure the parties that the information will be kept.
So no, no higher pay level, but just use caution, as merges cannot be undone.