That's a good question. I don't think regulation really improves things though, it just adds another layer of obscurity and involuntary regulation (is there any other kind?) goes against my libertarian sensibilities.

As for the people who 'can least afford it', well they need to learn how to be paranoid, the sooner the better.

Reputation is, to me, the best way to ensure trust. Build a public reputation through transparency and actions. Of course this takes time, but in the end is better than than an external entity imposing regulations.