A similar thing happened with FlowTex [0]. FlowTex was founded in 1994 by Manfred "Big Manni" Schmider [1, second on the right] and Klaus Kleiser as a business for selling horizontal drilling machines. After a few years, they claimed to have sold over 3000 machines, each for 1.5 million marks. In reality, they had only sold around 270. They sold non-existing machines to leasing companies and immediately leased them back, without ever delivering the machines. This made it look like there was actually demand for these machines, which encouraged banks to give FlowTex more loans to buy (non-existing) machines. When the banks wanted to see the machines, they showed them a few in one hall and then served dinner. During dinner, they replaced the serial numbers on the machines, drove them to the next hall, showed them again to the bank representatives, created another disruption, replaced the serial numbers again, and so on. This went on for years.
When the scam collapsed in 2000, "Big Manni" was living in a palatial mansion on 15 acres of land [2], had houses in Cannes, Miami, Ibiza and St. Moritz, and owned a 55 meter yacht that previously belonged to the prince of Brunei. He had 2 private jets and a helicopter to fly him 10 km to work every day. In total, FlowTex had received over 4 billion DM (over 2 billion euros) of loans for buying fake machines. It quickly became clear that people in the ministry of finance and the tax office knew about the scam for years and did nothing to stop it. FlowTex paid taxes on the money "earned" from selling the fake machines to the leasing companies, politicians were proud to have such a successful company in their home state, and he was a large donor to the governing parties. I recall seeing a documentary once where it was hinted that even people inside the banks at least suspected it, but profited from provisions for giving out the loans and did not raise any alarms.
[0] https://en.wikipedia.org/wiki/FlowTex
[1] https://www.bbheute.de/fileadmin/news/56352147.jpeg
[2] https://www.durlach.org/data/media/35/flowtex2.jpg