Investing on education is good for the future of a country but when a country keep investing on education and start producing more graduates year by year but they failed to make the enough employment opportunities for them will make the economy into mess again. Graduates will start working for less pay and the remaining will move to other countries for better salary and pay taxes to those countries but at the end one who produced the person will be benefiting nothing from it.
Actually you are right, a country where graduates are too much or a country where they invest much on education would face the unemployment crises. Looking at so many countrys today we find out that graduates are becoming much and no employment opportunities are been created, and it make the country hard and
also increases the crime rate. I suggest in a country where graduates are much all they need is for the government to provide employment opportunities and also the graduates should also go for some skill, they should have a good skill which would be their source of income. At lease been self employed.