Thank you for the encouraging words and I am sorry I didn't see your remarks earlier.
You are quite right in your characterization of the universities -- the way they suppress wages for researchers, both faculty and various levels of research assistants, should attract strong condemnation. And yes, a union could work. But we do have things similar to unions, called learned societies, like the APS, the ACS, the AAAS, the science academies in many countries. But their voices are not strong enough. Perhaps it is a flaw in the ``market-driven'' system, the workers, no matter how well they band together to ask for more, can never really change the system. The instruments of control remain with the rulers and the middlemen, while a few leaders of the workers are rewarded with a seat at the high table, as a distraction to the rest and also as something to aspire to.
My suggestion would remove one of the controlling instruments from the hands of the middlemen, so as to provide some freedom to the workers. If the agencies are actually looking for novel research, they would allow something like this.