Football

we don't have the budget or the draw for him to get in the worlds best players .... currently
only city and chelsea could afford to buy the players he would require to make a good go of it
without having the players he had a barca he couldn't replicate the style of play
no messi no 50 goals a season no premiershit title at liverpool

Monies or a time machine. Those players were incubated for a number of years witha deeply ingrained DNA. There's little chance of being able to find that else where. He's like Steve Coogan; he's hit his high water mark and unless he goes back it'll be down hill from there.