Obama himself thinks that he doesn't deserve the price but that it's a huge incentive for doing a good job. I guess this also was the main intention of the committee. Maybe they also thought that it will improve his standing in the USA a little where he currently has a very difficult time with all the ridiculous hate against him. This probably will backfire though.

@mercuryus: Of course there are people like Hitler on this list since every country can submit their own suggestions.