The answer is that going forward this can't be sustained. That's why this important. Historically Man Utd could pay the top wages and buy the most players because they generated the biggest surplus. Now they do not.I find it hard to understand how united are earning the same or less than us, yet they're able to at least match our transfer spending whilst they also have a higher wage bill and service their debt and pay out divis to their owners and all other shareholders.
We should however note that the two clubs are at different places. City just got to the CL final, and won the league. Utd are struggling on the pitch and can still match our financial performance.