Sorry if this is boring or isn't relavent to your thread.
First of all I pay my pension - or rather it gets deducted from my pay-packet. Then comes rent and bills and savings, then food (and I seem to spend a hell of a lot on food), drink, travel and all that other stuff. The last proper big, frivolous purchase I made was over a year ago, and that was a Telecaster.
I don't know if I get what I would consider to be a reasonable level of happiness from most of these purchases. Case in point, I'm going to move back to my parents' house at Christmas because I don't think I'm getting 417.67 worth of joy a month for the box on stilts I'm living in at the moment, even though it is in a great central London location.
Another big money-magnet in my life seems to be eating out. I love it, I do it all the time, and it costs a bundle. I've been asking myself recently if I get my money's worth. I don't know. I rationalise it by saying that I haven't got anything else I'd rather be spending it on, so why not? That usually gets me through the door of the Viet Grill. I then get a nagging feeling that it would have probably been better saved.
I do gamble occasionally, but only on the 2p machines in amusement arcades. Also, I might by a couple of lottery tickets a year.
In answer to the question "what good is money if you don't spend it?" I think the most obvious answer is "it can give a sense of security for a future that might be uncertain."