Why do most young people don't know who to vote for?

"There's a disease affecting young voters.
It's name? Apathy!" (http://www.govspot.com/features/youngvoterapathy.htm)
But how come?
There are various reasons for the apathy of young voters, both in America and in Germany. The most determining reason is probably that the younger generation of voters don't think that politicians put through what they always predict. Therefore they can't really identify with one single party. Once they feel sympathy for a political party and its manifesto, they will be disappointed because in the end the party is not able to get their aims through. Young voters, having not much know-how about voting, lose trust in politics as they feel not being taken seriously by politicians.
In American, for example, the number of young voters during the last presidential election had fallen to 32%, comparing to the year 1972, which was the first year that people aged 18 and over could vote. In this year there was an attendance of 50% of young voters.
In Germany it is just as in America: the senior generation dominates politics. Comparing the attendance in Germany, in the Federal State of Baden- Württemberg, in 1980 and in 2009, it is striking that the "Bundestagswahl" in 1980 had nearly the same number of voters- old age and low age- both around 25%. In year 2009 young voter's apathy was about 83%. (http://www.stuttgarter-zeitung.de/stz/page/2238918_0_8245_-wahl-analyse-spd-laufen-junge-waehler-davon.html)
Why are these young people so peevish?
Perhaps we already have an answer to this question: Our political system is too far away from our own living environment- it just seems like something very abstract to many young voters.