You've forgotten to mention the cruiselines and theme parks. Although totally separate from the theatrical branch you're discussing (to the point where they can't even get the rights to do a mini-Lion King on a Disney Cruise), they do some great hiring of their own, particularly recently. The Title Of Show guys just did a Disney Villains show for the cruiselines, the GrooveLily guys wrote a Toy Story musical for the cruiselines and eventually Disneyland, one Avenue Q writer wrote a Finding Nemo musical for the Animal Kingdom... debate the quality all you'd like, but their small cruiseline and theme park shows help fund musical theater writers to create their own next big thing.
On Disney Saved Broadway—By Hiring the "Most Original Creative Minds in the Room"
You've forgotten to mention the cruiselines and theme parks. Although totally separate from the theatrical branch you're discussing (to the point where they can't even get the rights to do a mini-Lion King on a Disney Cruise), they do some great hiring of their own, particularly recently. The Title Of Show guys just did a Disney Villains show for the cruiselines, the GrooveLily guys wrote a Toy Story musical for the cruiselines and eventually Disneyland, one Avenue Q writer wrote a Finding Nemo musical for the Animal Kingdom... debate the quality all you'd like, but their small cruiseline and theme park shows help fund musical theater writers to create their own next big thing.