I understand tipping when the employee's hourly wage is less than minimum, due to the expectation of receiving tips to offset it. I see it as low as $2.13 in hour in some states for food servers, but currently set at a 'normal' minimum wage of $15.50 here California. Meaning my 16 year old high school self would have been bringing home about $300 a week based on part time work at current wages. Pretty d#mn good.
So, I do not understand tipping for maid service. It is a minimum wage job, one which I held in high school. I was never tipped, and I thought my paycheck was fair with regard to what the job required. It was not the hardest of jobs, but it was certainly dull. I changed as soon as I could to something more interesting. And isn't that the point with regard to minimum wage jobs? They are not meant to be the end-all and be-all of wages?
Same with regard to walk up counters and fast casual food establishments. It's not my job to supplement your choice to work a minimum wage job. It's just not. If you want to earn an actual living wage, start your own business, go to trade school, go to community college, go to university. It's up to you. It's not up to me.
Basic economics dictates that the more people there are that can do a job, the less that job is worth. That is why minimum wage jobs pay . . . minimum.
We give pretty darn generously to a variety of charities. That is just simply not how I view my local frozen yogurt or hamburger joint worker.