Firstly, firing you for making this statement is crazy.
But one problem with giving employees a cut of the profit from their ideas is that everyone becomes incentivized to try to come up with home run ideas vs. doing necessary but non-revenue generating projects and tasks. [1]
The pizza party and cardboard wheel is kinda ridiculous--like something from The Office--but that's the (sad) norm at a ton of places. Most of us are extremely luck to be at the other end of the spectrum in tech/startups.
[1]: Great article on this topic by Joel Spolsky: http://www.inc.com/magazine/20090101/how-hard-could-it-be-th...