Despite all the lore of the Raiders being a dirty team, Al wouldn't have paid bounties for taking out players. He expected you to take out players as part of your regular salary. Take out some big players and your next contract might be bigger, but there wouldn't be a specific bonus tied to taking someone out. Al was too smart re: the rules, and too much of a bad ass to expect his players to anything less than hit people as hard as they could.
So in that sense the fact that the Saints had to pay people extra to get them to hit Favre or Warner harder is kind of sad. Weren't their players already motivated enough?