Western corruption is starting a company to produce y and when a government orders x of them, x are delivered

Well... not always.

The initial contract award called for the combat-ready tankers to arrive in August 2017; the first arrived in January 2019. In the years that followed, the KC-46 program was beset by further delays, including production line problems that regularly stalled deliveries and an underperforming vision system. That system is years behind schedule and expected to come in October 2025.

and

Broken Boeing airplanes are going to the military thanks to corruption and bad decisions

Increasingly, the US model for contracting is to take money, outsource the work to a bunch of bargain basement contractors, pocket the profits, and then fail to deliver the end product.

Also R&D is priced in because it’s all done for the sake of making profit and must be recovered through the unit sales.

Again, this is something of an open question. The engineering of a given retailed unit is priced in as part of the unit rate. But the bluesky R&D is, as often as not, performed at the university level and then arbitraged through the private sector or simply stolen from rival militaries / companies / individuals through espionage and laundered through the private sector.

The Octopus Murders, on Netflix, tackles the anatomy of this kind of government-backed swindle with regard to the development of early iteration database technology.

The real difference between more Socialist/Communist models of corruption and the Western Capitalist style tends to be in the legal canonization of the corrupt practices. You really got to see this in the post-Soviet liberalization of Eastern European economies, as mafia cartels were supercharged by western financialization and eventually subsumed the entire federal apparatus of ex-Soviet states. What was considered a criminal black market prior to 1991 became the standard for managing the economy a decade later.