I think about this kind of simplistically.
Firstly, answer to yourself is it practically possible to store and use vast amounts of data safely, without risk of being compromised?
If you say no, then we shouldn’t be doing this. If you said yes:
Since you think it is practically possible to do safely, the penalty for any company who fails to do this should be instant corporate death. Instant nationalization and liquidation to compensate the victims. People who are found in court to be responsible should face severe consequences. Criminal negligence, multiple counts.
That’s the only way I see to get all of these data hoarding fucks to take it seriously.
/end pipe dream