Hold on, the guy holds "an extremely senior position" but has only been there for 9 months? Additionally, he claims to be able to retire tomorrow if he wanted.
Something doesn't sound right.
Nope, your spidey senses are way off. He's been at Amazon for about 8 1/2 months. His job level is one which is normally associated with a director level role.
Source: I work at Amazon.
It's almost like he did very well at another company prior to joining Amazon.