It has to do with ethics rules on how monies raised in a political campaign can be spent, and years ago it was decided that the money could not "enrich" the candidates. The money has to be all spent on the campaign, the candidate can not "keep the spoils." So a candidate could not buy a car (or a jet) with campaign monies and keep it after the election.
This would mean that the money spent for hair and makeup during the campaign is okay, and clothing as well as long as it does not enrich Palin.
So she does not get to keep the clothing. Pretty straight forward...except it seems to have come as a surprise to Palin et al.
,