The only ways to resolve this problem are to eliminate the minimum age or to impose a maximum age, effectively cutting off a percentage of the elder populace equal to the percentage of young people prohibited from voting. Both solutions are less than ideal. The other reason for the difference in ages is that young people typically vote in fewer numbers than their elder counterparts. It's alarming because, as young people, we have more at stake in elections than other segments of the population. Think about it.
Congressional decisions made now affect our lives far into the future.
Contrary to what you might think, college students possess a great deal of power. Corporate America has figured that out. Yet for some reason, we seem unwilling to wield our political power as well. It's not that Washington refuses to listen to us, it's that we're not saying anything. Congress' decisions right now may not affect your life beyond making net porn harder to find, but the decisions they make now will affect your life down the road.