There are lots of public schools with much higher drop-out rates. Maybe those folks don't go into default, but they're still paying for an education that they didn't get.
> Training in the trades is a different issue.
Nice duck, but until there's another mechanism for training tradesfolk exists, it is insane to destroy the one that we have.
And, I'll bet that German employers rely on outsiders to do the training. Either that, or the training is useless outside the employer. While employers may like the latter, it's a bad idea.
If German employers use outsiders, we're just quibbling about who signs the checks, not who actually pays.