> Those who benefit from the education are "taxed" for it in the form of loan payments for a few years, those who don't benefit (directly) from the education are not.
Not only that, but the benefits of free/cheap education largely accrue to the middle and upper classes whereas the lower class also has significantly higher taxes under the European system.
I'm most familiar with the UK where universities like Oxford, Cambridge, LSE, Imperial, etc. are all overwhelmingly middle class. I'm sure the pattern is repeated in Europe as well.