My understanding of the changing of the rules "as you go" is that it's based on the reality being faced by the system. Bitcoin's proof-of-work is simultaneously one of it's strengths and one of its weaknesses, and Ethereum has chosen to move from PoW to PoS because of the belief that it's the right path to follow in attempting to solve the problems the system is facing in reality.
I don't think the "working class" vs. "ruling class" analogy is particularly fitting. However, to continue the analogy, the profitability of Ethereum mining (from what I've heard) would have allowed pretty much all of the early "working class" to have climbed the social ladder to "ruling class" if they held onto some percentage of their earnings (you know, like "savings" or "investments" in this real-world analogy). If the "working class" believed in the longevity of the project they've chosen to work for, wouldn't they see the investment opportunity? Otherwise they're just there for the immediate profit, and there's no long-term contract or agreement that's been broken. The system is evolving, like what happens in the real world.
> As a Bitcoiner... > We wouldn’t dare... > We would never... > doesn’t have a ruling class to take advantage of other classes
Bitcoin Cash, Bitcoin Gold, Bitcoin Satoshi Vision. Take off the rose-coloured glasses, "your community" isn't sunshine and roses either.
Personally, I think PoW may be what brings Bitcoin down in the long-term.