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.
In a real sense, a country or state is not supposed to invest entirely on education, when you invest in education, try to also invest in human capital development because with this, there will be more employment opportuneties for the educated ones. When people are educated but have no employment, it means that their economy is underdeveloped or they are experiencing a bad government which is one of the reasons why the unemployment rate is rising every day in the world and I believe people mostly move to other countries to search for greener pastures when they can no longer endure the hardship in their country as a result of unemployedment.