Saw this story earlier this month about MLB umpires: http://www.datanami.com/datanami/2014-04-08/come_on_blue_data_reveals_umpires_biases.html
MLB umpires miss pitches, they even widen the zone. Umpires can and will get the pitch on the inside or outside portion of the plate, that pitch is hitable. Its the pitches on the chalk that are unexcusable. Mistakes happen and that pitch is called but consistantly calling that a strike is wrong. Umpires I know are NOT just in it for the money. $65 is not a lot when you factor in travel, gas, gear expenses, and time away from family. Dont give me this, "I wish I made $32.50/hr BS" because you gotta factor leaving work early, driving on avg 30 min each way, gas money, change in the parking lot (for crying out loud, what other sport has their officials change from the trunk of their car), then umpire a game and go home.
Thats my two sense, there are ones who put a black eye on the sport but the ones I know work hard at it, put in the time to go to fall camps, and try their best to be fair to both teams and call the game how it suppose to be called.