"Performance bonuses" do exist in the military; they are called postings. A relative in the Navy was given a rotten job to do. His performance bonus? Posting as a naval attaché afterwards.
Then there are the airforce postings. When I worked at CAC the grumble was that we were always up against it trying to sell a local product because the RAAF guys that were involved in the selection and management of the project were hanging out for overseas postings. The last thing they wanted was a "posting" to Fishermans Bend. Don't for one minute think that overseas suppliers don't know this either and milk it for all its worth.
Hang around enough messes and you will get "war stories" about the hospitality in Seattle, St Louis, Los Angeles, Phoenix, etc. etc.
As for CASA, I can easily believe we are harmonising with EASA just because of the number of European trips it will generate for CASA staff. Same with ADS-B we are providing the material for perhaps a dozen technical papers and a doctorate for someone and reasons to attend lots of seminars and conferences in desirable locations.
Then of course there are the thinly veiled bribes from suppliers: "We are holding a conference on thronomisters in Monaco next month and we really think you should attend".