If the secret service is relying on snooped messages as the main affective method to catch criminals then it's doing it wrong. They're stuck in the WW2 mentalit

If the secret service is relying on snooped messages as the main affective method to catch criminals then it's doing it wrong. They're stuck in the WW2 mentality where they could listen on radio and decrypt codes. Back then it was very effective but that was 60 years ago. Secret services should consider decrypted communication as a nice to have, but they should be completely capable of being effective without decrypting communication channels and listening on private citizens.