Then you should understand, that adding for example 0.01 BTC to the system as a tail emission, is effectively the same situation, as taking single satoshis from all accounts, and giving that to the miners.
You don't get
single a specific amount of satoshis from all accounts, though. As you said, from the transaction fee, 0.5 sat/vb goes for the tail emission and the other 0.5 sat/vb for the reward. This means that only those who make transactions are those who fund the future reward. And you can't charge satoshis from all the addresses without the respective signatures.