Sure we can talk about making jobs better for workers, but for 70% of all jobs? And how many of those jobs would still be unpleasant, even if bosses were perfect and conditions were prime? The poll mentions that benefits like vacation time and flexible hours seem to have little effect on employee engagement.
From that very article, "most of the discontent stemmed from "bosses from hell".
If the quality of life is better leaving (and only having enough for necessities) than staying, than as I said before, -better the person leaves-. Not just for the individual, but for society at large. Because then the company, if it actually needs that job filled, will recognize "this manager is shit". Right now, the need to provide food, shelter, etc, for oneself, will keep disgruntled employees working, and the company may not realize (or may not care about) the working conditions. A UBI inverts that power balance.
Now, you say the job may still be unpleasant even if the bosses were perfect and the conditions were prime? Unpleasant to whom? There are janitors, roadkill cleaners, undertakers, etc, who legitimately enjoy their jobs; just because you or I don't find the job enjoyable enough to take to move our lot from "barely gets by" to "has extra money to spend on luxury", doesn't mean others won't.
http://www.ryot.org/gallup-poll-70-americans-disengaged-jobs...
Sure we can talk about making jobs better for workers, but for 70% of all jobs? And how many of those jobs would still be unpleasant, even if bosses were perfect and conditions were prime? The poll mentions that benefits like vacation time and flexible hours seem to have little effect on employee engagement.