Is that an effective thing to do?
It's certainly something I have heard recommended many a time. Though usually without the "higher than the opponent would estimate" bit -- perhaps because most people who are moving jobs are moving to jobs they expect to pay more than they're getting now, so the situation doesn't often arise.
If funding were available, the Centre for Effective Altruism would consider hiring someone to work closely with Prof Nick Bostrom to provide anything and everything he needs to be more productive. Bostrom is obviously the Director of the Future of Humanity Institute at Oxford University, and author of Superintelligence, the best guide yet to the possible risks posed by artificial intelligence.
Nobody has yet confirmed they will fund this role, but we are nevertheless interested in getting expressions of interest from suitable candidates.
The list of required characteristics is hefty, and the position would be a challenging one:
The research Bostrom can do is unique; to my knowledge we don't have anyone who has made such significant strides clarifying the biggest risks facing humanity as a whole. As a result, helping increase Bostrom's output by say, 20%, would be a major contribution. This person's work would also help the rest of the Future of Humanity Institute run smoothly.