Do you have to report a ton of posts?

Do you have to apply?

Are you just selectively chosen?

I see a lot of staff members who are less then a year old here on the forums and only have a couple hundred posts and you see people with thousands of posts, long time trustworthy members and not staff status or ever mentioned being offered such. Just wondering how they are chosen? For example:

https://bitcointalk.org/index.php?action=profile;u=210680

has been here for a year and only 600 posts. Yet staff already??