He might want to to punish enemies or reward supporters; “control of government” id, in practice, not infinite power, and people often use such a position to, first and foremost, secure the position.

> I mean, "I can't" is an honest answer

Which is a reason Paul might want to let it be known that some form of accountability will be asked in advance. (Which he also might due to push the actual vote results; if it is projected to be close, expecting a cost for voting the “wrong” way if one candidate wins will likely shift some votes.)