Why is it that the rich think they can get whatever they want, whenever they want, however they want?

On July 3rd, I was performing at a private party in a partially built house that obviously cost in the several hundreds of thousands of dollars.  This house was built on the shore of a small, man-made lake in a neighborhood of similarly large, expensive homes.  This party was attended by quite a number of people and the band performed inside the house on a balcony!  There were even fireworks over the lake after dark.  During the evening, people were walking around taking up collections to pay the band.  (Which I found odd considering there was already an agreement in place as to how much the band would be paid.)

The band performed several sets and even played longer than scheduled.  (Don't give me any grief about us starting late.  It's not our fault you didn't arrange adequate parking for the band.)  There was an agreement in place for the band to be paid a certain amount of money at the end of the performance.  However, the amount of money actually paid to the band was $100 less than the amount agreed upon!  Needless to say, the band was stunned!  We had just sweated our butts off performing for these people on a balcony in an expensive home where the owner had built the garage deep enough so that he could back his boat in while still attached to the trailer and he can't come up with the money to adequately pay a band he had hired in what we thought was good faith!?!?!?!?  Fer cryin' out loud!  You can't complain that you couldn't afford the band, because the amount was agreed upon BEFORE the fact.  You knew full well how much it was going to cost and you didn't flinch then.  What could have happened in the meantime?

Without mentioning any names, I just want to know, WHERE THE SCHNELL IS MY MONEY!?!?!?!?!?!?!?!?!?!?!?!?