It's not the trip/expensive spending itself, but rather how you go about it. If you are always pulling out the calculator and splitting shiit up, that's lame.
And if you think money has nothing to do with it, then you are lying to yourself. Nobody is saying to pay for everything and spend loads of money, but a lot of dudes have this mentality to literally split everything and wonder why she feels a way. If you want to be a leader, as a man should be, you can't have your follower(s) putting in the same amount of work as you. Period.