Then people might try to game the system. I think you present the excess to one person each day that receives votes as the best (public) goal matched. It incentivizes people to publicize their goals, which helps the business, and also makes them more likely to fulfill the goal. You will still see gaming I'm sure, but at least it will be vetted by peers.
In a way "burning" the funds already does distribute them to everyone else.
Since that is now money that is forcibly and irrevocably taken out of circulation, so therefore everyone else's money is worth slightly more because of it!