It's kinda turned into a "by any means" game since passing legislation is such a bottleneck in their logjammed system. Democrats do megabills with amendments when they're in power too.

The Republicans in theory have a point, but in practice any standalone bill would stall, be shot down or lost, with the reasoning from Republicans likely being "we have more critical things to worry about". And yes, its also extremely hypocritical for the exact reason you said.

It's usually not this dramatic though. Absolute fealty to Trump is required from Republicans... We've never had a Congress this subservient, not that I can remember, hence the knots and justifications are getting twisty.

It happens all the time, I wouldn't say it's corruption, it's more hypocrisy. It's ok when they do it, but not ok when Democrats do it.

It's about what's relevant to the bill anyway, an amendment about Epstein isn't really relevant to the bill or the subject of the bill as far as I know so the Republicans wouldn't be totally wrong to say as much, they'd just be hypocrites but they always are so that's nothing new. The Democrats were doing it to get Republicans "on record" saying "no" so they could use it against them in the midterm elections, but I don't see that helping at all when the Republicans can just cry about process and their friendly media will back them up.