“And he wasn't paid until he delivered, like any contract with a business”

I don’t know the specifics of these contracts, but I very much doubt it based on my experience. That’s not how any Government development contract I’ve ever worked on has worked… There are startup payments, payments for milestones (including many at the start for various design stages before anything was built), payments at varying levels of build, etc… - often more than half (sometimes more than three quarters) of the contract value was paid before the final product was delivered.

We did some pretty cool things too (this was in defence satellite communications) but various Government customers took like 80% of the risk on the development most of our big products (obviously we had already proven our design abilities with smaller components but much smaller scale), which we would then sell to them and other Governments.