Why does the magic cost so little in 4e Options

[tete]

I'm just wondering why being an adept/magician etc costs so little. I mean 5pts for an adept with a free magic point. Who wouldn't want that? I'm still used to Magic = A, B if your lucky so think long and hard before you take it. It would seam to me that magic is the most unbalanced part of the game with there being no cap on magic rating. Everyone else will eventually max out their abilities while the magic users continue to get better. Isn't that an edge that should cost more upfront?

[edit] the only thing I could think of is to make it more like earthdawn where your all adepts but that seams like a weak idea.