My philosophy is that pitchers should only get paid for a succesful pitch not just for pitching sake. Like a no win no fee arrangement. Perhaps adopting this philosophy would weed out the con men and the folk who take on any old crap to pitch. At the moment these guys are on a win win scenario...whilst the songwriter is on a lose lose. This would force them to only choose and pitch the best pitchable songs...it would raise the bar and probably make folk more open to accepting pitches from trusted sources. OK all songs are subjective BUT professionals usually can spot the good from the bad.
It would also help if folk pitched only their very best material thereby helping the weeding out process even further.

http://www.soundclick.com/bands/songInfo.cfm?bandID=687727&songID=5238055