And the corollary is that when it comes down to it, more people enjoy low fares than they enjoy service standards (you only need to look at the most successful air carriers being low cost carriers - or of course, protected markets but that's a different issue) or the way the company they buy things from treat their staff - and that is true across all industries all over the world.
Not that that excuses poor treatment, but I think we all suffer from a bit of hypocrisy, or at the very least selective bias, if we equate our purchasing decisions with condoning the way an employer treats customers/staff/suppliers/the environment/social expectations/local laws - especially if you live a life with relatively wealthy standards of living.
We end up using jet fuel, and god knows that the hydrocarbon and energy industries aren't the most morally upstanding. So, whilst turning a blind eye is probably not what we want to admit to ourselves we do - that is the reality of it.
It is really a matter of where you want to direct your energies: if boycotting a company or a region of the world does that for you, then, all power to you. Expecting others to do the same, is, I think expecting too much, and not something you can castigate people for.