I suspect most of them who know about it appreciate Tim Bray standing up for them and consider it a "meaningful way".
I don't understand what you are saying is a "more meaningful way" than what. You are saying keeping your mouth shut at work and just calling your legislator is a "more meaningful way to change the conditions"?
That's a nice story to tell yourself when you want to preserve your good salary and safe working conditions that the workers in the warehouse don't have. I couldn't really say if most well-paid employees at Amazon agree or not, I'm not familiar with enough of them.
But if we can't learn to protect each other, we've got nothing. This is not a test.
That's not possible, the US has the worst worker protection laws in the world, it's really quite an undeveloped country in that regard.
I'm not taking the claim you replied to at face value (it's exceedingly extreme to even be plausibly true) but they at least included a "probably" to allow for some doubt.