SpaceEx has made a ton of progress in space travel, granted it's not an ideal situation with it being a mega corp, but it moved a hell of a lot faster than NASA could have.

Perhaps someday we'll have individualized space flight like we have ownership over our cars and private planes.

Don't know what you're getting at by saying the galaxy will be ruled by mega-corps. Seems pretty democratic so far, and most of the things achieved couldn't have been without organization.