Why would McCain pick a veep who had lots of experenience? He has plenty of his own.
That would be because McCain is 72 years old. His experience dies with him. Palin has no real knowledge of the world.
A VP should be able to take over if the president dies. Everybody dies, and old people do it more than young people.
The vice presidency has not usually been an apprenticeship to the presidency. You could ask President Quayle about that, or maybe Presidents Agnew or Garner.
Or Van Buren ,Jefferson ,Rosevelt ,Bush ,Nixon ,Johnson ,Johnson , Ford ,Tyler ,Fillmore ,Arthur ,Coolidge and Truman.
Man,...!, doesn't that look like a rediculously overpowered law firm?
http://www.adherents.com/gov/adh_vp.html