I think people are overestimating teh power of wild surge. Almost all wizards won't stand any kind of spell failure, its so detrimental. Yet with this ability, not only do you get a 5,10,15, or god even 20% to do NOTHING next round, but you lose a whole lot of pp as well. Plus they get no bonus feats, and a lot of the really cool powers you only get as a psion or with a feat.
I have also made a few npc wilders, and man I would much rather have a psion any day of the week.