And you are not quite correct on who the people involved on the government side are. There are management paper pushers, but every engineering team has government engineers working side by side with their contractor counterparts, and the program has been run that way from the start. They do far more than just "check boxes". They have helped with the design and testing all the way through the program.
I'm curious about the government engineers and their roles: Do you mean aeronautical and other engineers who do the core development and design work? Or do they monitor, provide customer input, ensure quality, and do other oversight of the contractor's engineers? Or something else?
Also, whose payroll are they on? Defense Contract Management Agency? Some other Dept of Defense group? Air Force?
With a program this big and that has already lasted over 15 years, the answer is going to be "yes".
But I don't see how trying to compare the F35 to a project from 70 years ago is relevant.