Lots of people here are complaining about tipping. How hard is it for a bunch of software developers to calculate 20% and add it to the bill? How hard is it to

Lots of people here are complaining about tipping. How hard is it for a bunch of software developers to calculate 20% and add it to the bill? How hard is it to understand that it's not a bonus, it's just part of the bill where the customer chooses the amount - giving you a little power and flexibility. Think of it like Patreon or donating to your favorite FOSS. This isn't a statement for or against tipping. I don't really care; either way is trivially easy and all that matters is the bottom line. I do care about labor conditions. I don't believe restaurant owners are doing this to benefit their employees. I wonder how it affects the power relationship between workers and owners, and I especially note that discussion of it rarely includes input from the people who actually do/don't receive the tips.