It can easily set the limit on what it will allow candidates to borrow, knowing that if the candidate doesn't own up to that debt, they will be on the hook. It will force the parties to be quite rational about what amounts should be spent and what amounts could be borrowed by different candidates. It will force them to reconsider the entry points, the criteria, by which we allow candidates to become contestants for leadership.
Right now money seems to be an important factor. Maybe there should be other considerations. Maybe it should be your ability to go out and get 1,000 or 10,000 people to sign a petition, depending upon which party it is.
Obviously there would be repercussions to this scheme. Obviously you're right in wanting to have further discussion with the various intervenors.