Unfortunately, most employers don't know the first thing about work permit applications, and rely on their lawyers (most of whom have to research as they go along) or their HR departments. It's good for me, as most of my clients are employers in just this situation, but really it's not that complex. It's just a question of knowing the rules and making sure all the documents are supplied with the application. Most applications fail when they should succeed because the people making the application don't read the rules!
Victoria