While I agree that the discussion could better be furthered by tabooing slavery, I think there is a much stronger analogy here than there is between, say, slavery and paying taxes.
For example, in theory, taxes constitute a high level social agreement to pursue certain goals which benefit all people, executed by an entity that fairly represents the collective interest. (obviously in practice this is a bit different.) In a perfect world, I envision myself willingly paying taxes to a law-enforcing singleton. This seems decidedly unlike "slavery."
However most people's day to day jobs are:
Slavery in the historic sense essentially had these characteristics, although in the sense of slavery in the historic USA it was often coupled with things like physical abuse and an intense loss of legal standing; and while desk jobs are harmful to one's health and the rich certainly have a different legal standing than the working poor I don't think that this makes for a good comparison.
Since when do people not choose their jobs or spend the vast majority of their time at work? Even the classic "nine-to-five grind" uses only a third of the day (discounting travel time), and none of the day on weekends.
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: