Poker Room Management Question

[uclaben]

My apologies if this has been addressed elsewhere. I was wondering why the casinos in Los Angeles give superior service/comps (free food, parking validation, etc.) to high-limit players given that the rake on these tables is essentially the same. In Las Vegas you're hoping that these individuals will give you action at the tables, but in LA this doesn't seem like much of an issue. Granted there are table games in most of the big rooms (Commerce, Bike, HP), but in my experience the upper-limit poker players do not spend a lot of time in that section. What is the casino's motivation in offering incentives to higher-limit players that are not offered to those who play smaller games?