The trick here is you need to figure out a business model where you don't take money from employers, because once you do its just the long slide to becoming a shittier LinkedIn.
Colorado now requires job postings to include something more or less like a "reasonable salary range". It hasn't been perfect, for example there are some companies who now just restrict their online job postings to say "except Colorado" instead of adding a salary.
But as someone living in Colorado it's been nice to know the salary range up-front more often and to have confidence that I can ask them for a salary range without getting the question turned back on me: "Well, what are you looking for?"
If you have a janitor in CO, every job is an improvement and potential promotion. Having to first go to that janitor for every position is going to wear out FAST. Posting for the CTO position? Go to janitor first. Posting for CEO position - same thing - that's what is going to drive folks away.
The biggest strength for me is that I can ask them and they have to tell me. When I was job searching before I'd ask the recruiter and then they'd always ask me what my target is. Not showing your cards is like negotiation 101. Plus it's made fielding messages and emails easier. If they provide a range, I can just easily say "This position sounds interesting but unfortunately the salary range isn't what I'm looking for currently."
You're right that a lot of positions aren't great about this, I've literally seen "Pay starting at $0.01" or ranges literally $30k to +$200k. But I've seen it as a benefit in the negotiation process and it's just been easier to field recruiters.
> total comp
This law only covers salary as far as I know, so equity and such aren't included. Total comp is different.
Unfortunately it looks like companies can just state wide ranges (which don't help applicants understand the market any better) and they can also omit other compensation elements beyond the base salary component (stocks, cash bonuses). That makes the disclosed information not very useful.
I personally like this proposal and am probably going to at least draft a hypothetical spec of it and see how it fleshes out. Thanks for the suggestion!
Pretty obvious value-add for job searchers. Not to mention that having access to this data would enable tons of other product features. Shows that most services/sites don't care that much about the applicant experience.