The very first thought I had when reading about a proposed graduation tax was this:
What kind of an organism feeds off its children.
We send our kids off to war, we make them foot the bill on their upbringing and if they still had any sense of self-worth we still go and tax them for thinking and learning.
In summary, I thought that this age of weak elders, and organized crime wisdom of the gutter rat had become our moral compass in a world where our young gets slaughtered [consider recent rape victims] and used as sexual kicks for the opportunists[as with that poor indian/bredasdorp-girl] and the super rich[Strauss Kahn, Presidents of your choice etc].
We look at leaders who all represent an era of a deprived upbringing, where clearly they were neglected and feeling unworthy, and slowly growing up to become forceful monsters who still crave just a little tenderness, but simply do not feel worthy of it. And for good reason.
And now, in the final chapter of our society, plunching into the black-hole left by the spoils of imaginary numbers[our bleeding money system, bleeding into bankers, medical vampires, uncontrolled global debt and china's human rights abuse cheap produce, etc]
Now we go and we look at our children; who somehow overcome this soul sucking upbringing of both parents working, being exposed to profiteering media that always shock, but never sooths or comforts. We ask them to survive the fracture which is our intellectual failure, and we ask them to go to war on our behalf, educate themselves on our behalf.
We feed them into our poverty as kindling and allow yet more debt, yet more motivation for evil to suck society into more mothers working, more children slaving and more children becoming little monsters we see in our neglected presidents, bredasdorp murderers etc. Its simply decades of selfish stupidity coming down hard on our children. As shameful as it already is... lets consider the impact it will have on science.
Will science pursue non paying ventures. If markets dictate what children study[by giving them bursaries that cover their graduation tax] markets dictate what human beings will learn.
If this system was in place a hundred years back a school would pay for Edison's direct current as opposed to Tesla's alternating current, and the result would be that alternating current would not win on university level because Tesla couldn't buy himself support[and the very computer screen you're look at now would not be affordable]. in the same way microsoft would buy only support for its programming languages and half the competitive cellphone androit phones would be blown out of the market and effectively eliminate its competition. Without any focus on php, or other open source ventures such as linux, the very world wide web would not be free as it is. It would be run by expensive servers only and the freedom we enjoy with free internet would simply melt away.
This style would eliminate the forces that keep prices down in most things. We would effectively bias knowledge towards taxing ourselves more harshly and the liberators of our society would be crushed.
More money out of your pocket and more money to some international company that spends its money over there, while our society collapses and gets enveloped in neglegence, rapists, poverty, theft and brutalized children.
You tax the tree when it starts bearing fruit. and that tax money you use to protect it.