Going to college actually spend more money then making more money. You can use the 5 years time in college to work as anything and most probably manager level after 5 years.
700 euro per year for 5 years = spending more than earning? Hm.
This might be in the US, but only insane people go live there.

700euros per year for college means people that don't go to college pay for people that do go for college, poor innovation, poor quality, lots of waste, bad administration and a useless degree at the end because too many people will get a degree
You lost the money you could have earned in 5years, the skills and connections you would have got as well