The problem of getting accurate data started to be solved when bar codes and RFID tags came in. It's possible for a factory to fake "we made 431 washing machines today." It's hard to fake "we made 431 washing machines today, their serial numbers were scanned as they left the factory, scanned again as they arrived at the various distribution centers, and scanned again when they were shipped to a customer, and scanned again when the customer received them." It's not airtight, but faking it requires a sizable fakery operation which tends to be detected eventually. Much real world activity is driven by all that "where's my stuff" data, and if the data is way off, people notice.
For large classes of products and services today, there is no real price competition. There just aren't enough players to make a market. The magic number seems to be four, from an EU study. Less than four major players in direct competition, and prices don't go down.
Unlike USSR they simply do it on shorter timescales, too, and with better customer feedback. Something Cybersyn actually targeted, as it's closer to Toyota Production System (as much done at lowest level in small decision loops) than centrally managed GOSPLAN or large american FMCG giants
I was wondering the same after PRW lol. Recently I had the chance to ask a friend of mine who worked in Google Infra (years ago) if they had ever tried to 'liberalize' their infrastructure planning; something like having internal business units bid on space, power, and compute instead of distributing it top-down. He said that yes, this was actually something like their original operating model, and the outcome was that YouTube basically bought up every piece of hardware in the company and then leased them out to other verticals at a profit.
There are a few small examples that come to mind (co-ops and communes mostly), but I can’t think of any that have been successful at scale. Running an internal market would be almost pure overhead, so if it worked it would really have to be efficient to be worthwhile.
https://www.forbes.com/sites/stevedenning/2013/07/16/do-inte...
https://www.versobooks.com/blogs/news/4385-failing-to-plan-h...
In addition to your Samsung example, I know of a major tech company whose services division often buys hardware from competitors because they get a 40% discount and priority deliveries when stock runs low. If they were to buy the in-house alternative, they'd be paying list price and be at the back of the queue for deliveries.
There's also huge scope for "funny money" Hollywood accounting-style practices, where internal prices become entirely disconnected from supply, demand, or any sort of underlying value - which actually results in the organisation being even more dominated by the whims of senior leadership than they otherwise would be.
(These problems are very similar to those experienced in country-level command economies too, of course)
Basic point is just that operations research/supply chain management was heavily developed by the USSR to support the central economy and now it's used by every major retailer (among others) to manage supply chains that are massively larger than anything the USSR ever got close to.