The problem is probably not the Pentagon, but appears to be the American Political System and national hierarchy of towns, counties, states etc. as a whole is no longer fit for purpose. Its response time was still probably OK when it took a couple of days to cross the country with news of a new development, but now that a new technological development can be in place and be on its third or fourth commercial revision inside a couple of months just blows the speed of response out of the water.
This isn't something that's particularly unique to the US systems (deliberate plural) of Government that are currently in place. [I recall a Sci-fi novel that had a galaxy wide "Bureau of Sabotage" whose role was to slow down developments and law making to allow Government & Technology to co-exist].
Is it likely that something will change in the systems of Government to allow themto be fixed any time soon? unlikely.....