I was not in the union when I was at RU (for 29 years) because at the time, all the negotiating was focused on faculty at the higher levels, and to hell with the assistant profs. But that was a long time ago.
There's a lot of misinformation in this thread, the worst being equating TAs and GAs with adjunct (course at a time) lecturers. The GAs and TAs generally do OK. Maybe they are behind inflation right now, but they basically get free tuition and a decent stipend. Just barely enough to live on, but if they team up with another GA or two, they can get by. But not by much. Now, how much they work varies hugely by department, and there are a number of departments that historically abuse GAs and TAs. So, if they are upset, then they may well have a case.
Regular faculty have pretty good salaries at RU. Again, they may have fallen behind in recent years, but nobody on a tenure track line is really hurting, and the top folks are doing fine.
But adjunct faculty are, and have always been, getting screwed. When I was there, they were getting around $2500 per course, and I think that's up to close to $6000 now. If you are going to teach a garden variety, stand up course for about 40 students or so, you are going to put in a ton of hours to do it right. This is where the University balances its books. Co-ads (co-adjunctant faculty) cover the courses nobody else wants, almost never know what the next semester or next year will hold, often do not get decent office space, and if they are making a living doing this, have to teach about 5 courses a semester to get by. It's a very tough life. It was never intended for someone to make a living out of doing this, but hiring has gotten so tight, that many people are.
If you have any sympathy for the strikers, it should be for this group.