Difference is, I imagine your uncle didn't have millions of shareholders who would lobby to fire
him if he didn't lay someone off. What he did was noble, surely. But at the same time, it sounds like it was
his business.
If Mike Duke (Wal-Mart's CEO) were to say, hey, we're going to cut our profit in half, but pay our employees double, he'd be shown the door.
The question is tough. I don't know you, but for a second let's imagine you're an average American. A percentage of your 401k is likely depending on Wal-Mart's stock rising. And your wife/husband's. And your parents' retirement accounts (whether it's 401k, pension fund, whatever). How much are you & your friends & family willing to give up?
If you want Wal-Mart wages to go up, invest in them. And convince all your friends, family, coworkers, etc to do the same. And your 401k holders (or union representatives or whoever manages your retirement funds). Eventually, you'll have a voice big enough to bring up the issue in stockholder meetings & have it be heard.
As it stands now, the board has a duty to their shareholders to maximize holdings, not to be nice. That can change though.