I hate their artificial wealth as much as anybody, but no title is easily won or "bought", no matter the size of your transfer budget, wage bill, or quality of your players. Just ask numerous Real Madrid teams and managers since 2000.
If City win the league, fair do's, Mancini has done an excellent job of improving certain players and the overall mentality of that club, sadly this will improve if/when they become champions. He saw the potential of Hart over the tried and trusted Given and it's turned out to be a key decision he's got right, he's performed a minor miracle in moulding Lescott into IMO a top, reliable CB, he moved Kompany from midfield to CB and has overseen his progression into a world-class defender and ideal leader, overall, Mancini and City have benefitted from the finances available to them but it's through hard work on the training pitch and gradual improvement over the last few seasons that looks likely to win them the title.
As for us, we've got no-one to look at but ourselves. A team who tosses away a 8 point lead in 3 weeks and performs in a virtual decider like we did tonight, deserves everything they get, or in our case, don't get.