the food prices will rise then. Being a waiter is a slave work. Tips are your only real income. If it ends then the stablishment must raise your wages. to offset this food prices must increase. If that happens costumers will be unwilling to pay for the same amount more. (because its a change in a short period of time) so you can offset by buying inferior foodstuffs, but then costumers are likely to not come back due to quality.

So How else to offset wages? fire a portion of the staff and make them work double or triple the number of tables. This will result in a lot of mistakes and problems. Another solution is a form of automation maybe software to manage orders and direct employees about.