Education being mostly free in Europe, I suppose that they mean private institutions, such as language schools or international schools. So this is mostly of concern for foreign residents. It may just be a natural adjustment to international rates though. For example, the price of language schools in Belgium varies from under 1 euro/hour (if state-subsidised) to about 25 euro/hour depending on the school. Even the most expensive schools remain amazingly cheap compared to Japan, where 30 to 100 euro per hour is standard for a regular English class.