Everyone's data gets sucked up as the default, but with Tor - I think they Snowden docs showed they could only get about 1/4 with automation. I do not remember the exact percentage.
The combination of CALEA, Stored Communications Act, and Patriot Act under the Third Party Doctrine mean the system stores and processes our data by default, over a sliding window. (IIRC there were some Snowden programs that had windows of around 5 years?)
With Tor you increase the cost to taxpayers a little and decrease the chances (especially with good cyber hygiene) that you'll give everything. If you use a cell phone you give your exact time and place 24/7. Even local police have access to these cell phone tracking databases. You can't Tor a cell phone.
Tor isn't really a good answer to the system. But if you need privacy, there's a corner in Tor.