Can you imagine the outcome if they'd pushed this issue into a massive strike? Railroad companies would bring in ACTUAL scabs, pay them half the wage, and eventually turn them into the long term workers while the former workers are suddenly out of a really well paying job. It was pointed out earlier, but railroad employees are the second best paid blue collars in the USA. They make bank. And they can thank their largely in tact unions for that. A strike would have given the robber barons of the railroad industry enough excuse to bust the unions and add railroad employees to the list of slave wage workers.
It's so fucking weird that the farther left is going "Yeah sure, I blame Republicans for this stuff too, but let me write up ten sentences on how Democrats are really the bad guys!"
This same shit happened with the Bernie campaign in 2016. The right went from calling him a commie before the primaries to throwing out pretend sympathy all in a bid to spread propaganda against Hillary and how she "cheated" in the primaries with the ultimate goal of dissuading the farther left from voting for Hillary. The real villains of worker rights are manipulating the fanatics against those willing to make compromises. And what happens when you shove out those who are willing to make compromises? You don't get compromises. You just get fucked.