There is this truly evil system that unfortunately is becoming more and more widespread and that consists of offering postdoc positions to recent PhD graduates in the Humanities. Postdocs make some sense in sciences. A newly-minted PhD has a chance to work in a lab run by an esteemed professor, engage in some research, get some publications out, etc. In the Humanities, however, this system makes absolutely no sense. Postdocs in the Humanities do the exact same work as Assistant professors. The only difference is that they are paid a lot less and don't get any benefits or support for their research.
The only reason why universities today open more and more postdoc positions in the Humanities is because they want to save money and exploit these poor postdocs without offering them anything in return. While in sciences a postdoc position is a necessary step that leads you to a tenure-track position, this is not the case in the Humanities. Once you fall into the postdoc trap, you might never climb out of it. I have seen people going from one miserable postdoc to another for years. Being stuck in this position means that you have no hope for tenure, no financial assiatnce for your research, no job security, and often no benefits.
I believe that we should do everything we can to resist the introduction of postdoc positions in the Humanities in our schools. This practice is exploitative and it robs young academics of any future. This is wrong, people. Let's not allow this to happen. More than half of all instruction at American universities is now performed by part-time faculty and this horrible trend is growing. We don't want our students to be taught by grievously underpaid, overworked, and exploited people who are worrying themselves sick about whether they will even have a salary next academic year.