Google doesn't sell their private data collection. They use it to target ads so it's the most valuable thing they have (or as they would call it their "unfair advantage"), so selling it directly is out of question. There are multiple data brokers that also have very comprehensive lists that will happily sell it to anyone.
You're gonna lose your mind when you hear about the census office. This last census also mandated you disclose your sexual preferences and gender identity. They have a list of black and brown people, LGBTQ+ people, and trans people. 😬
The problem is that you're putting the entirety of the government and all the departments into a singular "they". There may be a point where separation fails, but you're already treating it like Vance has unrestricted access to everything.