I don't claim to know a lot about the ear mark thing, but as Ron Paul stated, the ear mark rules in place as of now say that the federal government already has a certain amount of funds they took from the state to Begin with, the rules say if anyone representing their state turns down the money, it goes back to the feds who blow it any way they want...so the smart thing now is to play the game, grab the money and send it back to the state, where it came from to begin with....if ya don't, they (the feds) will squander it. So Paul sent it back to the state, where it belongs.
He also said he would like to get rid of all the earmark rules and let the states keep more of their money in the first place.
I don't know the answers to any of this, but it seems right now we are all stuck with earmark fed rules, no matter who you are. Any Senators who say "keep it" to the feds, is pretty dumb, their state would be better off with it, so maybe that's why hardly anyone gives it back to the feds, unless they want some PR...? Who knows...all in all Ron Paul is the best choice in my book, if you search long enough and listen long enough he explains himself pretty good. No he ain't perfect...neither am I. But I'm glad after his explaining how all this earmark mess and rules are a pain...he sent the money back to his state. He figured it belonged there instead of in the feds pocket...who knows where that would go. That's what I got out of it. Anyway, earmarks is used politically just like anything else, you give your state the money, or let the feds run guns across the border with it, either way, your toast in somebody's book.