So the choice isn't Big Brother companies who want to know where you are at all times and respectful companies who allow you to get your work done how you want. It's between companies who are following the applicable tax laws or those who are not. A company that is structurally opting to not follow laws seems untenable. A company is a legal construct in many ways. Whether or not the employee can commit something like tax fraud is perhaps a less interesting question, because, yeah, you can probably cheat on your taxes.
Talk to people who work for a big consulting firm, they've been taking "tax holidays" for the last 70+ years to ensure they don't spend more than 50% of their time away from their home base.
These companies are no fools; they wouldn't eat productivity and billable hours if they felt the state wouldn't care.
That's precisely the point; Many workers are not applying for work visas, which makes them outlaws and subject to deportation. Some countries have digital nomad visas with 0% tax rates now, but not most.
> If I have a po box or perhaps even a street address in WA or TX (no state income tax) but live in an airbnb somewhere in CA, how can the state figure it out?
Hypothetically, CA is financially incentivized to find that out, how is the the question.
But, if they do then they are going to
1) audit
2) if you don't respond to audit and tax -- arrest
3) at the same time suit the employer, especially if they have any operations in CA for not declaring your work properly.