My whole point is, this is why we have weight classes. Whoever lifts the most in the weight class wins. All of the stupid coefficients complicate the hell out of things. For example, lets take 2 superheavyweights. One weighs 400lbs and totals 2850. That is a wilkes of 694 and probably, what, one of the top 5 highest totals ever? But then a 309lb guy totals 2730. Which is about the same wilks. So is that a tie?
By the way, not to be a dick, but in your example, the 250lb 750 squatter would score 13 more wilks points than the 150lb 500 squatter. haha. See what I mean though? These coefficents arent even good at describing relative strength... which is what they are supposed to be doing.
I do agree that we do need some sort of efficient comparision system/equation but there really isnt a good one yet. The only thing that would make sense is an equation that compares, say whatever you or anyone else lifts at whatever meet at whatever time, with the all-time records for your federation in your weight, age, and gear class. See what I am saying? Let's take your example, Say that 750 squat at 250 was the 10th highest all-time for that federation/weight class/age/gear catergory and then that can be equated to a number through some fancy equation. But if that 500 at 150 is 5th all time, now the little guy has a higher relative score. I don't know, something like that. haha.