Every single retail/fast food related job does more then the face value of their respected jobs. Your statement applies to someone that works at McDonalds too. They don’t just put your food in a bag and give it to you, there’s cleaning, inventory, machine upkeep, prep and more. If your hourly wage was that of a server which is like what $3.00 an hour then tipping would be much more reasonable but it’s not. At the very least the federal minimum of what 7.25, 7.50? Which I doubt you guys take in depending on your state it’s far more (yes cost of living is higher). So I stand by my statement just because your drinks cost slightly more doesn’t mean your responsibilities and expectation are any different then any other fast food worker. Your solution to your dissatisfaction is push the cost on the customer (which your employer would prefer) instead of demanding more from your company and just accepting it when they say no.