Many years ago my father (worked in corporate HR all his life after RAF WWII) said that it was a 'rule of thumb' that: The first generation starts the company. The second generation expand it well. The third - lose it. I saw this happen to a business in my extended family.
What we have with Boeing is the standard 'corporate outgrew itself and became complacent.' Like thousands before them, they thought that the bigger they got the better (and wealthier) they would become. Very few large corporates study history, then apply that to themselves when projecting into the future. Same goes for Dictators when they have the country under their thumb. They think that will not lose control and will pass it on to their sons. Nope.
As we know, Capitol Hill will not let Boeing die but, at some stage, they are going to be twisting arms.