I think you're missing the point with Bloomberg. The whole idea with that place is that they don't
like offices: they don't want anyone to have one because they think offices are a
bad thing. They think people work better in one big giant, open, noisy room. A bunch of companies these days have bought into this philosophy, and a bunch of young hipsters think it's great.
So Blooomberg hasn't eliminated offices to try to oppress people as you're implying, or because of any egalitarian ideals, they've done it because they genuinely think it improves productivity. You and I probably agree that this is incorrect, but we're not Michael Bloomberg. I know that I would hate working in that environment, but I know about it so I don't apply for any jobs at Bloomberg. Many of the people who work there probably actually like it that way; extroverted people like very different environments than introverts.
I used to work at Intel back when we had 8x9 cubicles, and now, after various different jobs and different working conditions, I now think it was one of the best work environments I've ever had. I briefly had a walled office at one place and that was nice too. But the 8x9 cubicles were pretty good; we had "do not disturb" signs we could hang across the entrance to keep people from bothering us, and things were generally pretty quiet and I could concentrate and work and not have to see people all the time. After that, things went downhill: cubicles got smaller, then the walls got shorter, they went away altogether, as companies jumped on the "open plan work space" concept to various degrees.