Originally Posted by
rickair7777
it was probably just convenient to attach it to a bill which was going to vote anyway, and expected to pass (rather than doing a separate vote).
The NDAA is pretty much sure to be passed each year (eventually) so it's a favorite for pork projects.
^This
worked on the Hill for years... And it is 100% the case. Must pass legislation gets all sorts of riders - legit stuff and pork alike.