Money is great, but knowing how to spend it is apparently difficult for a lot of these clubs
Look at the money City have spent in the last 5 years, then look at their team. Even on paper there's so many weak spots.
Kompany has been declining ever since his World Class season, they usually play with wide midfielders yet their only out and out winger is Navas for Christs sake. Their midfield bar Toure is the definition of average and the one striker who can carry them through games is injures 60% of the time. Of course that particular case isn't City's fault, but the team they've assembled doesn't remotely reflect how much resources they've had.
How can you be so stupid to spend so much that FFP comes calling, then realise your midfield is comprised of Fernando and Fernandinho, your most reliable CB at times is 50 year old Demichelis and most of your fortune was spent recycling bench strikers.