Tigerwoman said it all... I worked for a film caterer in LA for 6 years....left in 1999. Had alot of fun, and alot of misery with that job. We had a very good reputation in the biz, Mostly worked commercials and higher budget music videos. We got $19 for breakfast & lunch, another $9 for second meal... which was typically burgers and quick on the run type food, as the last meal was usually at wrap. We were paid by production, chef and one cook for up to 50, extras after that.
Charged for gas, propane & ice., out of area...about 70% local LA area, 30% on location...NM, Utah, Vegas, San Francisco. Worst job, Marlboro Adventure Team commercial shot in Monument Valley Utah.... 30 days of hell,,,,Bad weather, break downs, miserable cast and crew.
We did do a movie on occasion, if the commercial side was slow... lot less $$ pp... and they want LOTS of food... Even if they don't eat it, they still want to see it... The last movie I worked was Dr Doolittle, The producers were constantly bitching that they thought we were not putting out a big enough buffet.... 3 8' tables with hot and cold, + main entrees off the truck and something off the BBQ daily..... They still wanted more.. But in the end they were happy.
Don't know what the biz is like 10 yrs later, but I assume that nothing has changed.