No issue in Celtic (or any team) getting better if they've got the resources.
But many a Celtic fan (not necessarily yourself) I've met has come across as very condescending when it comes to City's spending, completely ignoring the fact that in comparative terms, the gap between the 'poor and rich' in Scotland is even wider.
Same with the attendance debate. You'll see many a Celtic fan slag off City's attendances, then only get 30,000 themselves for the less glamorous games. In fact, I think I had this very debate with you last season ;).