Regarding tests: It's still problematic that self-administered antigene tests have weak sensitivity (so even if you test every day the tests will miss many case

Regarding tests: It's still problematic that self-administered antigene tests have weak sensitivity (so even if you test every day the tests will miss many cases). PCR tests cost something around 100€ a piece, so assuming Germany has ~90 million population, that's 9 billion Euros for a single cross-sectional population test. Now let's add some speculative factors: Some 10 million (+/- 10 million) are strongly opposed to state-mandated measures. Some will evade the tests, some will fake them, some may become violent. These people are also among those who are most likely to be Cov-positive. Also, testing the entire population would only help if you simultaneously lock down the borders to prevent re-import. So while broad testing has its merits, I feel like the gains here would be mostly modest.