Waste of money or economic stimulus?

Rambling and disorganized... thinking.

I am not really talking about the stimulus package here - I am more curious about the benefits of spending exorbitant amounts on architecture, new medical procedures, luxury goods, etc. While my initial reaction to people spending insane amounts on basically useless things is negative and exasperated, I think it might actually be a good thing or a neutral thing. Money spent is money earned by someone else. The faster money is spent, or the more it is spent in a given period of time, the more it is used, right? A dollar spent 10 times in a year is more useful than a dollar spent once.

Foolish spending, however, does not promote efficient industries.
Inefficiency leads to costing more for the same thing - which is basically inflation, no?
If you invest in a foolish project, you are not going to get your money back plus interest, you are going to lose money.

So all spending is not equal.

Architecture is not necessarily foolish - it can promote business, tourism, etc. But I am suspicion when government money is spent on extravagant airports that are going to be used regardless.