If I made bad decisions in my job as often as some of the refs we see then I'd have no home, wife or car because I'd be out of a job and on the streets. Plus the hospital in which I work would have no patients either!!
Given how costly to clubs, fans and players some of the shocking decisions can be - i.e. the goal awarded to Reading, there should be strong repercussions... i.e. a fine or suspension. It seems that it's an "us and them" scenario though, with the FA constantly backing/supporting the refs and not coming out with common sense (take, for example, an incorrect dismissal/booking - even if the ref is wrong the FA won't rescind on appeal if the ref says he saw the incident. WHY?!?!?!?! It's so frustrating!).
The obvious thing to do would be to have a panel of officials with monitors and that would tighten things up so much, plus players would most likely play a bit more honestly/cleanly if they knew that there was little chance of getting away with a cynical challenge. Yup, I'm very much in favour of goal line technology etc.
Remember that the set up of a referee and his linesmen is a concept as old as the game itself. Times have changed, technology is much greater and there is so much more money involved not just for clubs but for the fans - a lot of supporters put their team first in their lives and scrimp and scrape so they can get season tickets or get to a game or two a season and it's not fair on them to have their day ruined by an incompetent referee.
There is a cliche that "it's swings and roundabouts," that you probably get an even keel of bad decisions that work in your favour or against you but I don't believe that's true, some teams will get more luck than others and I don't believe luck should have any dominant place in the sport. The game has rules to keep discipline and make the game fair > having dodgie decisions week in/week out does not achieve this.
I'm also sick of hearing "well, referees are only human you know!" Given that that is classed as an excuse just supports the argument that a machine should do the job for them. And why is it that when I'm watching a game in a pub, 95% of the punters in there will correctly spot an offside from their table even after excessive amounts of alcohol?? Because anyone can do it, except -evidently- the referee or linesman who can't see from his angle. All he needs to assist is someone with an overhead camera or a side view to radio over his headset to point out the offside; it wouldn't add that much time over the course of the game, even if there were 20 offsides for either side - you're looking at perhaps an extra four minutes added on to the game, great value for money!
PS Effenberg, you were an effin amazing player ;-)