One time our party had bad service at our first time at a restaurant (lunch with coworkers), waited 60 minutes for our meals when other people who arrived after us got their meals and us asking for an explanation and getting nothing while waiting, we tipped a dollar for 100+ dollar meal to give them a message. When we were leaving the manager and server stopped us and asked for their tip and tried to guilt trip us into leaving a bigger tip. You can never go back to the same restaurant again because we joke you cannot trust them to not tamper with your food or ignore you or make you wait much longer for every thing. It's a bizarre guilt trip experience that has spread to every food serving business, the business pays less to employees, so the customers have to pay for their food plus extra for the employee to do their job with a smile - cashiers/counters where you pick up food/drinks expect a gratuity and it's built into point of sale touchpads where you are forced to select from different gratuity amounts. It's very weird when compared to any other country I've been to.