Governments are deeply incapable of stopping even just basic crimes and fraud. If they can’t stop overtly criminal acts often committed with no technology to assist in obfuscation, why would anyone believe they can (a) detect network traffic somehow related to Bitcoin and (b) trace it back to an individual and (c) prove that individual has broken some law? Let alone to do this to perfectly law-abiding citizens conducting perfectly legal purchase of Bitcoin.
Your point is very bizarre to me. Are you suggesting a government so incapable of managing fiscal activities that it descends into hyperinflation crisis is somehow magically super competent at extremely bespoke and difficult internet traffic surveillance of legal cryptocurrency transactions they have no reason to need to invest in expensive capabilities to monitor in the first place?