Lol. Orton is 31, roughly the same age as guys like Rivers and Rodgers, and a half decade younger than Brady, Brees and Manning. He was out of the NFL for all of 5 weeks.
Jackson is old, yes, but that's why you have quality depth like Spiller, Dixon and Brown. And we have a strong group of playmakers at WR.
Outside of TE and the interior OL, we are about as complete of an NFL team as you are likely to see in the salary cap era.