Why should an employee give up some of their wages temporarily to other employees? Let's pretend he decides to do that. Now everyone but him is paid. So is he supposed to go into work and work for free until the producers can gather the money for him? Or stay home until he gets paid? Because the first one isn't acceptable and the second is what he is doing but with extra steps (and who knows what sort of tax implications)

That's literally not his job. He is being a good brother to his fellow workers and standing with them until they get paid. If he wanted producer credits he could go negotiate for them now and then the production could use his money, but again: not his job.

Cranston is doing the right thing. Just because he is a very well paid employee doesn't mean he should be expected to 'bend' the rules so Producers can make their movies. Any number of the producers are actually in a position to do exactly what you are asking of Cranston. That IS their job.