You can only put 11 players on the pitch.
Which is why you need to put the best 11 out you can, spending 75mil on one player when you need to replace the keeper, maybe both CBs, maybe both full backs, at least two central midfielders is nothing short of absurd. City have monumentally more money to spend than Liverpool and they deemed him a waste of money. If they wanted to outbid Liverpool and offer higher wages they would, absolutely. City have spent big but haven't thrown around 75mil on a single player for a reason. They are buying smart and getting vastly better value for money than Man Utd, now Liverpool, Arsenal and Chelsea. Though Chelsea have made some pretty damn good deals themselves in recent years with Hazard, Fabregas, Cahill and a lot of other players also not being massively overpriced either, where Chelsea lose value is in wasted buys who barely play, don't get used in rotation and leave for pretty cheap.
Can is heavily rumoured to be off, Wijnaldum is for me, easily improved on, Henderson for me is no where near good enough, Ox.... time will tell. I said at the time that with Wenger it's perfectly possible under a decent coach he'd improve but people are getting hyped up about performances against rubbish teams like Swansea, he's been very poor in multiple games for Pool already and for Arsenal he had the same few really good games while being mostly crap the rest of the time. If he doesn't improve then that is a horrible horrible deal but I honestly can't see him becoming really top class, worth 40mil nor a position that couldn't be easily improved.
Baz said that 75mil on a CB who turns out good is better value than 30mil on a CB who turns out crap.... but it's just as possible for this move to not work, for him to not settle in Liverpool, for him to not gel with his team mates and drop off in quality as much as Lovren did. When I watch him play for Southampton I don't see anything particularly special at all. Ota was 35mil, Stones 50mil being home grown, I don't think he's shown the ability of either yet will cost a huge chunk more for a club with much less money and more positions to fill, it will never not seem crazy to me.