It is a problem of their very own making simply for trying to get gold-plated and high-risk stuff; EFV, F-35, MV-22.
Then there is this:
"The Corps draws off less than 8 percent of Pentagon spending, including Marine aviation funded through the Navy, Robling said. “For that piece of the budget, the nation gets 19 percent of its tactical helicopter force, 12 percent of its tactical fixed-wing aviation and 30 percent of its maneuver battalions,” he said, in a speech before the national sea services advocacy group."
Easy solution. Roll those resources into the other services. Yet again: we do not need a second land Army. Also; USMC-air existed and performed its mission before the Harrier came along.
In any event, I would say that The Hill and DOD will end up creating more of a hollow force because of political graft instead of doing a major reorganization (based on logic) of roles and missions throughout the military.
We will have a very expensive military without much capability. Politics first.