If you live in a society, you benefit from its education system even if you didn't attend it, as all the folks who were educated in that society's educational system are the rest of the folks who contribute to the economic system and its health and robustness.
I didn't judge in my comment if it is good or bad to organize a society based on these values. That seems to me to be a bit unrelated to the situation at hand, where you have to move across countries and switch different systems. That fact that you may end-up paying "double" is what I was raising.
