Something like lack of impulse control can be learned to a certain degree. As can other things that are associated with bad work ethics.

A solution could be that the government offers help for people who struggle finding jobs. Training courses can help them finding (and most important, keeping) a job.

Some European countries already have courses like this and underemployment there seems lower than in the US. But crucially, free mental healthcare is an important part of this so that those who need help can get it.