I used Kane because he's similar age to Salah and similar goal ratio. He's had nowhere near the impact on his team that Salah has had. If you pare away the nationalities (premium paid for being English) and the actual contract situations ie free next summer or whatever, how do we reach a valuation for each? What parameters do we use?
This is where I factor in their individual impact which is loosely based around how successful each of their teams have been and why I think Salah's pay rise was about rewards for what he's done rather than what he may do. It's a reward for him not an incentive. (It should actually be an incentive as well I might add.)