Man Utd's wage bill has been closer to 50% of their revenue for a couple of years, but the figures are always a year behind.
The likes of Di Maria, Falcao and Mata won't have had a chance to have an impact on them, yet.
Ours has crept up slightly over the last few campaigns from around 50% to their present level.
As you don't appear to have given any reason why this is relevant, I'm not sure why it's being discussed, though.
The actual bill is much, much higher, which is why the club can attract and keep players like those signed in the summer (and Anderson).