Driver's License says "Steal Me!"

Here is the envelope that my renewed driver's license arrived in. As the de facto ID here in the U.S., it would seem odd that this coveted piece of identification should be packaged so conspicously. Even better, I, or anyone impersonating me, could apply and receive a renewal all through the mail. It would seem that the TSA and Homeland Security should be concerned that identification used to board a commercial jet should be so insecure.