Steve,
Plaid bag, eh. I think I had that one too! My first set was a hand-me-down from my aunt. Those lasted about 2 years until I got a very used set of 1971 Wilson Staff (screw-in weight chamber in the toe). I loved those clubs.
The margins on new clubs, except in custom fitting, are extremely low. With the exception of golf balls (a strong margin item), it's likely Tour 18 would make around 10% anyway. It's obviously a loss leader.
The growth of custom fitted clubs is certainly a valuable service to the customer, but the value-added is also one of the few ways to help make any significant margin.
I'm not economically astute enough to make any predictions concerning the manufacturers' bubble bursting. Tim Weiman brings up a good point; I don't believe enough of the manufacturers are attempting to carry any savings from technology over to the golf professional and consumer. They spend unbelievable amounts of money on marketing. Would a burst be helpful to consumers?
I don't think it's a situation of appealing to the lowest common denominator. As billg points out, historically the growth of the game has hinged upon groundbreaking technology and resultant affordability. As a golf professional, I'd like to be able appeal to new players with custom fitted, reasonably-priced new clubs. It's available in components now, but the branding of the named, major manufacturers is a significant issue.
I love the idea of an affordable, family-focused, private golf club. As you know, the ccfad simply grew out of client oriented golf and that idea flopped in the recent economy.