People keep saying this but it borders on conspiracy talk. The Air Force leadership has been pissed off at Boeing for well over a decade. Every project they've been given has turned into a clusterfuck even moreso than average. They fortunately had the foresight to not give them any cost-plus contracts, so at least it's Boeing eating most of the cost overruns rather than the Air Force, but the point remains that Boeing mismanagement has been a headache for the military.
Politicians care about getting elected, which means they don't want layoffs on their watch. Politicians don't care what the military thinks or else they'd stop funding a lot of dumb projects that the military doesn't give a shit about - of which there are many.
There are so many examples of congress putting their hand on the scale that I really don't understand the popular insistence that the military is the problem here.