But if that salary data is concentrated heavily on the top performers, there's probably an idea there that bonuses are playing compatibly more of a part? Overall, we may not be spending much relatively speaking, but as with my Sissoko example, he's probably taking a 75k base but whose to say Alli hasn't been pulling 150/200k a week on average including bonuses this year when it's all taken into account? I may be totally wrong, and maybe it wouldn't be sustainable, but that's a way of paying only our real top performers the top wages that can compare. Similarly Kane must also get an absolute wedge which moves him up there, and I imagine Toby and Jan must get a heavy amount for clean sheets plus wins. We can do this because the likes of Trippier, Lamela, Sissoko, Wimmer, Janssen, Winks, CCV, Davies, Vorm, GKN are probably paid comparatively a lot less. In fact, I wouldn't be surprised to hear Vorm getting a comparitively high base compared to lots of other members of the squad because he has less chance of making appearances for example.
Maybe someone with the time and inclination could look into our last accounts and see if that works? Of course, there's no reason why a Man United also couldn't offer heavy win bonuses, but they will also have a squad with more experienced players that can realistically demand it be higher. As long as our young players are consistently rewarded with new terms, key roles, constant improvement and more money through bonuses than they've ever dreamed of, they're probably very happy. When they hit Walker's age for example maybe they start thinking about the money (although guys like Toby, Jan, Mousse and Hugo don't seem to mind) maybe we will move them on, but only after we've got the best out of them and probably when their inclination to run quite as much or focus too much on the 'system' is reduced.