Newey was paid £3m last year as a base pay, and has a 66% bonus clause for Drivers title and Constructors title, thus earning him £7m pay last year, altho Red Bulls bonuses are still to be announced for 2010.
Newy at Ferrari wouldnt work, Newey is a control freak, he has a team of arround 30-50 guys that work with him, and he does everything on drawing board, with guys putting the drawings into CAD that is fed into CFD. Ferrari couldnt work to that way, they need instant success, and looking at Newey at Red Bull, it took him from the RB3 to the RB6 for success, doubt that Ferrari (or Alonso) could wait for 4 years for success as when Newey is presented with a change of team in a stable(ish) rules environment he cannot build, look at the McLaren to Red Bull time and the Williams to McLaren time as well, both took time, Newey is a new formula expert, and with 2013 2 seasons away, i doubt he would want to switch when the RB chassis is where he left off at McLaren in 2005/2006 when he signed for Jordan and then Red Bull paid Jordan off (According to Eddie) to get to Newey.
If Ferrari are in desperate need of success, i think they need a less autocratic system in the team and a more democratic system. Ferrari are fine, i think, they just need to find 2 seconds of pace, but that is only to peg Red Bull at the moment. What Ferrari need is to streamline their operation as all the teams are now operating faster, quicker and more efficently, Ferrari are the old hulk of 750-100 employees, they need to get to the 300-400 of what the rest of the top teams have.
As JET pointed out, what Ferrari are trying to do is the Man City/Chelsea route in the Premiership and what the likes of Real Madrid also are doing in La Liga, buying up the better players to weaken their oposistion. It is a system that may be be succesful in the intrim, but long term it dosnt work, as in 2008 when Chealsea missed the ultimate prize at the end of the Champions League. Money + The Best = failure in most respects.