Aryeonos
I don't think your depiction of working hours is entirely on the mark. Yes, the setting is an oppressive dystopia, and yes, the term wageslave exists for a reason, but a key part of the setting is the control over the population the megacorporations have.
So, while a wageslave might work a long week (and I'm not entirely sure every wageslave does work 80 hour weeks), the corp wants them happy enough so they don't just up and kill themselves. This concept is further reinforced by the fact that wageslaves are paid in corporate scrip, which can be used at corporate stores for their full value, to buy all the things the corporations sell, creating a sort of incestuous economy.
There are posts on the forums describing why this doesn't work on a theoretical level, but it is very much a setting staple so I just go with it. The megacorps obviously blast everyone with as much ad as possible, because everyone isn't just scraping by with the bare minimum or there wouldn't be a marketplace for all the things the corporations manufacture. As a point of example, a 40 hour/week Day Job nets you 5k a month, enough for a low lifestyle (2k/month) and various sundries not covered by lifestyle (like car payments, nice meals out with the significant other, etc). A middle lifestyle (5k/month) would need two jobs or two people working 40 hours to maintain, more if you're living in Manhattan.
In other words, I don't think "everyone is scraping to get by", and I don't think everyone spends "80% of the time at work". But that's just my view of the setting.