So your idea is creating a LinkedIn without spam. My thread of thoughts is like this:
1. Spams are from recruiters.
2. They are sending spams because no matching system can connect them with right candidates efficiently.
3. If there is this kind of matching system, recruiters will be redundant. Right now the decision makers are actually hiring managers and the team, recruiters can only filter obviously unqualified candidates, which is achievable with algorithms.
4. Eventually, why do we need recruiters then?
5. A more aggressive version of your website is similar to my idea, a LinkedIn (but better) without recruiters.
6. How to monetize this website since we cannot expect hiring team to do all the recruiting? We deliver a LinkedIn integrated with job boards and ATS and we charge enterprises. That's why I called it recruiting tech, not merely a website.
7. Actually, we can add many other ideal features.
Another obvious issue with today's recruiting is that every giant wants to maintain a talent pool, so they throw all kinds of events, and recruiters are helping with this. however, if they are able to socialize their candidate database attached with ATS, and keep them updated, I believe they are more than happy to. I think both your idea and mine is a good angle to solve this problem.
Anyway, let me know if you're interested in working together.