Because the guy flipping burgers doesn't have a separate $2.13/hr minimum wage, and flipping a burger takes much less effort. Please don't go out to eat, and please don't have children. For all of us.
This is wrong. Or at least really misleading. No server in the USA is making, tips included or not, 2.13 an hour. It is federal law that they be brought up, tips or not, to a minimum of 7.25 an hour. The 2.13 is the least they can be paid per hour with tips included as long as including tips they are making at least 7.25 an hour.
Which means, regardless of effort, a server is making 7.25 an hour everywhere in the nation. The thing is, if that 7.25 is coming out of the restaurant/business' wallet, they are usually looking for a job elsewhere pretty fast. Is it a great wage? Nope, not at all. Is it the same as the guy flipping burgers? Yes. Except the guy flipping burgers doesn't get a bonus based on performance (in the vast majority of eating establishments) vs. the server who can literally only make more more than 7.25 based on effort. Never lower. The check they receive isn't indicative of how much they have actually made in the slightest, as it is always used as a buffer for the 5.12 the government says and then it is further garnished by taxes taken from their reported tips. So yes, servers can have ass checks, but the more ass the check the more money they actually made.
And, as someone who has worked with/been a server for a long time, the vast majority of food service servers/waiters are shady as fuck when it comes to reporting their tips, so they are most likely making much more than even their check/assumed income leads one to believe. Only those who work in the most draconian of surveillance/security style restaurants (casinos come to mind) pay close attention to what they are reporting. And even that is sketch in most places. I'm positive my best servers are also raking in an additional 10-20% on the side that isn't reported, every year. Which comes to probably 7-13k, easily.
Don't feel bad for the servers, man.
If anything, remove the concept of "tips" as being a taxable income again, then people can actually be tipped on performance and not on some absolutely inane social stance that was forced on us by the government in the first place. Single mom's with shitty jobs aren't my problem. Especially not in this day and age.