People need to get a grip, there are occasions where several things can happen, firstly something can hurt, a lot, at first and you stay down unaware of how bad it is, then quickly get over it and get up. You can't enforce anything to do with things like that as you can not in any way quantify pain and its stupid to try. After having severe pain in my knee for so long if I feel any pain in my knee I instantly stop and wait to see whats what, hopefully i just knocked it and it goes away but I wait and pray that I didn't do something more serious, rather than continue what I was doing and maybe make it worse.
Some situations are similar with diving, sometimes you dive to avoid a massive collision, sometimes you dive out of the way to avoid injury WITHOUT the intention of gaining a freekick/penalty/getting someone sent off. Again its hard to quantify. You shouldn't get a freekick for avoiding a tackle, but you shouldn't get punished either.
average wage being equal is utterly retarded as, as has been pointed out a footballers career doesn't last as long as a teachers, nor do teachers who move up into headmaster, board of education, and up and up make that same salery, in every profession there are incredibly highly paid individuals.
Salery caps to make anyone in the league at least competitive, fine. The clubs get a huge amount of cash from tv money and winnings, even if you come last, somehow somewhere there should be a cap that means based on the average income from various sources that the top of the league can't afford to pay everyone 10 times as much as the bottom of the league. IN reality, you should be looking at maybe a 80k a week salery cap. Considering how many are above that right now, getting it any lower than that is a non starter, and even 80k will be a hard sell for most top clubs to agree.
The thing is if Ronaldo/rooney/Lampard are on 80k, its going to be hard to justify Bent also being on 80k.