Yeah, but they're not blowing money on the hard, complex parts, most of the cost overruns have been due to poorly thought out "cost saving" measures, for example producing the factory tooling before the plane if finished being designed, only to have to go back and redo all of the work when the design changes. Indeed the impetus for the project was to reduce costs by moving everything to a single airframe, based on a fundamental misunderstanding of the cost of aircraft development. At the same time many decisions were made based on maintaining political support instead of efficiency, which was always going to increase cost. Yeah, this isn't the the first time a project was poorly managed, and it won't be the last, but this is not an example of competent people giving it their best shot.

The claim that something is a jobs program is often used to justify not caring about waste, but that doesn't really make any sense. If your goal is to maintain a large pool of skilled individuals, it makes sense to do lots of highly efficient projects. When you do things efficiently, you can provide jobs to more engineers, and support a wider range of projects to maintain a more diverse skillset, plus you get more useful products out of the program.