flatbush, I have been saying that for years!! When a boy goes around in a limo, the first 500 dollars at least goes towards the limo instead of the yeshiva or organization.
My brothers tell me that the balabatim will give more money if they show up in a limo as opposed to a van or something. If this is true then the system is very skewed.
The boys also love the shtick of driving around in a limo and do rent them for the fun of it. Purim is a time for tzedaka. If they davka enjoy riding in a limo they should rent one with either their own money or sponsered money that people know is going directly for the car