I was under the impression that someone did the math a few years back on the US government making long-term/indefinitely-kept recordings of every phone call. No

I was under the impression that someone did the math a few years back on the US government making long-term/indefinitely-kept recordings of every phone call. Not every phone call for a calendar date, or for a city... but all of them, going forward, forever. It was deemed expensive, but feasible given current pricing and technology. Especially when the cost would be amortized out over the next 15 or 20 years... it might even fit in a black ops slush fund budget. Maybe I misunderstand, but the technical challenge has been lost. Only legislative obstacles are now possible, supposing they ever were.