But ultimately, the people making the contracting decisions are agencies like CMS, HHS, the VA, and DHS. And with USDS, the agencies now have solid third party to provide technical advice--for example, that a consumer login system shouldn't cost $80 million to develop.
That's why you see results like the one quoted in the article, where a $200m initial healthcare.gov system was replaced with a $4m one. And if you read between the lines, you'll notice that the major federal contractor for healthcare.gov decided not to bid this year: http://www.wsj.com/articles/healthcare-gov-contractor-optum-...
Sometimes the good guys win.
[1] On the other hand, the engineers at those companies generally want to do the right thing, if they are empowered to.
I like to think that if everyone of the contractors had their customers' interests as priority #1 that the current situation wouldn't be happening. This is why I have few hopes of much changing down the road without a massive reform. The most skilled, talented contractors tend to have trouble surviving the system despite the funding vehicles available.
Even the SETA system created to "police" contractors a bit in the government's best interest is fairly easily gamed by the reality that people form relationships and that people can easily switch companies.
I think what was probably key is to find an internal champion within the organization you're working with. If you can find a good partner on the business side, you can often get things through the bureaucracy if you're patient and diligent.