I don't believe your intentions are pure, but in the holiday spirit I will indulge you.
First, occupation aside, lets talk about compassion and spirit and humanity. I personally feel for any human being that is struggling financially, including cases that were brought on by substance abuse or other poor decisions in life. I have a personal list of organizations that I support financially and up until very recently, I made it a point to get involved with more than just financial donations, by giving some of my time, really getting involved. Unfortunately, having been taken advantage of and feeling under-appreciated, I kind of got away from that earlier this year. Maybe I will be "moved" to get back into that.
One of my favorite things to is and I do this a couple times a month, is to go to the bank and get a couple hundred in $5 bills and then just hand them out to those begging and even the ones not begging that are obviously in need. A block or two on Fremont Street or a few intersections of pedestrian crosswalks over the strip, and you can go through a couple hundred dollars pretty quickly (and that's really a sad thing) And yes I know that every organization advises against handing money directly to "these" folks. I don't care. I am offer compasion...no strings attached. I don't care if they run out and buy a bottle of booze that is going to help them escape their predicament for a few hours, if that is their choice.
So, I don't feel I am lacking in compassion. BUT, I cannot support every person working at McDonalds or Walmart, and I am not talking about high school kids working a part-time job, I am talking middle aged adults trying to make ends meet. I can not supplement all of them, nor will I try. There are life choices, job choices, choices not to pursue education. I just can't support everyone stuck in some low paying job, who is having trouble making ends meet.
And this brings up to the dealers. Just like the adult working at McDonalds (I don't actually eat at McDonalds...just an example), I cannot support and supplement the income of these dealers. Many are doing just fine. But those at some sort of lower end property, have to take responsibility for where they are in life. Find a better job Find a second job.
And this brings me to the second point about Dealers. I just don't feel a dealer is a job like a bartenders or waiter/waitress that people should be tipping. It isn't providing a personalized service. It is a menial, mechanical type job. The only reason there is tipping involved is because the casino owners are pushing their responsibility to pay a fair wage onto the players. The owners and corporations are making plenty of money that they can pay a fair wage.
Now the math. As you stated and I guess you are getting this from Colin, the math says No. Card counters play to an extremely slim advantage and we just can't afford to give much away. And nothing would ever be enough anyway. Let's say, I decided I would tip 10% of my EV. I average about $80 an hour in EV. Some good games more, some mediocre games less. So $80/hr. Problem is I am NEVER at a table for an hour with my short session approach. Let's say I play for 30 minutes average (and in reality it less). Average EV for 30 minutes: $40...tipping 10%, that's $4. There is almost no situation that my $4 in tips would be appreciate, especially on a shoe with positive count and higher wagers. Here I am placing a few $400 wagers and winning and tipping $1 at a time? Or maybe I am fortunate and win a few max bets and walk away up 12-15 hundred dollars, do you think my $4 tip is appreciated? No! It is met with such disgust, I am better off not tipping...that is viewed as less offensive.
As a card counter the only case anyone has ever made that mathematically makes sense for tipping is if your tips are buying you better penetration or something along those lines. That makes sense. Problem is...THAT is collusion. Not a middle ground, but a clear definition of collusion. Yeah nothing likely to come of it, but it's morally wrong, on both the part of the player and dealer. Zee....YOU opened up the morality window. I don't want to win that way.
For my final thought, I am going to circle back to the owners pushing their responsibility off to the player. Because of this connection to possible collusion that I just laid out, the casino industry should have never even allowed tipping from the start. Pay the dealers a fair and decent wage and remove that possibility.