Unpaid internships are essentially a form of serfdom. The serf system in Russia IIRC started with free peasants who sold themselves into slavery to the landowner when they fell into debt - unlike African slaves in the US, who were essentially kidnapped into servitude. In the same vein people are taking up voluntary servitude in order to get a paid job - sometimes even paying for the privilege. Moreover - a point not…
There's a temptation in politics to see patterns and then fit language to it that kind of fits. It's important not to do this, because it ruins the sense of scale. For example, when someone describes a politician they don't like as a "fascist" it's disrespectful to the memory of people who are squashed under tanks and who are taken in the night by state agents, raped and murdered. Along these lines, it doesn't fit to…
No, but that's how serfdom started - through voluntary servitude.
The point isn't to equate 21st century Europe or US with pre-19th century Russia. The point is that serfdom is a form of voluntary servitude which people entered into out of desperation. Likewise, nobody works for free (outside of charitable work) unless they are desperate (or they are rich kids, and don't need to care). Companies exploit this through unpaid internships - assuming they can get away with it.
Saying "you're free to walk away" is not a moral argument; if the only way a young person can find work is through doing voluntary servitude then they are stuck in that position until they do so.
Minimum wage laws exist for a number of reasons. If people don't get enough from employers, who pays ? The welfare system, i.e. the rest of us. So employers can exploit the system to boost their profits. Second, how does it fail to protect people ? Since when did a living wage for a day's work become a controversial issue ?