<human>: Can you succinctly summarize the text in 1-3 sentences?

Hello Reddit,

I recently joined the staff of a very large hospitality organization (which shall remain nameless) in California. I work as a server in the restaurant connected to a corporate club.  They offered me a good salary, above minimum wage, and an optional benefits plan.  However, I don't receive any form of compensation for the service charges put on my tables.  Every table has an automatic 20% gratuity added and none of the service staff gets to see any of it.  In fact, if we are given a tip on top of the gratuity we're supposed to inform a supervisor and it's taken out of out paycheck.  Is this even legal?  I know in the past I've heard that withholding tips is illegal but I don't know enough about this issue to start a conversation on the issue.
<bot>: I don't receive any off the gratuity any of my tables leave for me, is this legal if they pay me a higher salary than minimum wage?