What are the best arguments against using mass surveillance to collect data?

Self interest. A lot of power of any sort it creates a power imbalance which creates instability.

Persons within the state or other state actors orchestrate a takeover because they are greedy or fearful and then their hold on power is also tenuous so there is a race to the bottom to stay alive.

Mass surveillance has potential ethical use which is the study of an information ecology. The participants are aware of their observation - their behavior and even thoughts change. Predictive power is lost and adds a multiplier to political instability.

An ideologue takes over and uses the apparatus to kill all those who can be identified as an enemy.

The apparatus is used for personal gain, the theft of industrial secrets, blackmail - becoming systematic and introducing crippling costs to anybody wanting to go into business or politics.

As a happens, I noticed a scientist at Microsoft answering another similar question: https://www.quora.com/What-is-the-best-argument-against-mass...

Note however that I want to focus on general arguments, not ones specific to any vendor.