If not, my response to that there should never be a 'comfortable wage'. Everyone needs that crappy job they hate - dishwasher, ditch digger - that pays nothing in order to motivate them to get out of said situation.
We all (most of us) worked that crappy job when we were younger, and hated it, and one of many reasons I stay motivated to provide value now is, well, because I don't want to be a dishwasher.
That's the beauty of The Market.
I think there is a reason for not having a mandatory comfortable wage; some people would simply not find jobs if we raised the minimum wage to a point were it becomes unprofitable to pay it. But that's the only reason for paying less. Not some BS sanctity of hard work thing.
Working at a crappy job causes suffering. Not having ANY job causes MORE suffering.
The solution you put forward (making crappy jobs illegal) is not somehow going to magically make poor people suffer less.
Oh, and how do you figure out which jobs are better? Hmm... maybe through some kind of market mechanism...