Publish absolutely every government document. There should be no such thing as a secret government document ever. If you don't want it known, don't collect it. Don't generate it.
Yep, everyone should know nuclear codes, inside agents in terrorist cells, where to strike to kill as many and do as much damage as possible, how to manufacture weapons and IEDs...
While I disagree with OP, that kind of information isn't classified. It's personally identifiable information which is restricted and secured, but it's not classified in the same sense as the person who leaked on discord.
In response to op, there are plenty of legitimate reasons to classify information that are not nefarious. For example, a diagram explaining the security systems for a building. It's better to restrict access to that document so it is less likely for an adversary to see the details, because all that would really do is enable them to identify weaknesses which they could exploit. Generally this sort of thing is called operational security and I think it is actually the basis for the US government's mandatory access control in the first place (e.g. "loose lips sink ships").
Why would the government know your voting history? Isn't voting anonymous where you live?
No idea what a tax id is but in Sweden everyone's home address, income, phone number, "personnummer" (a unique ID assigned to every citizen), and some other stuff. And for the most part it works pretty well. I'm usually concerned about privacy but I don't mind this because it applies to everyone equally (except a few people with protected identity for safety reasons) and it's just so open and convenient.
I'm not saying that all government documents should be public information but here most documents are.
And if all records had to be public, there would have been a hell of a lot lower chance of nuclear weapons being invented. Because who would want to give that weapon to everybody else as well as themselves?
Yes, I think so. I think absolutely everybody capable of having one, having one, should cause nobody to want to invade anybody else, etc. Because of the threat that such an action poses, and if humanity is dumb enough to wipe themselves out with nuclear weapons, then we weren't meant to be around anyway.
And? For the average country, the difficult thing about nuclear weapons is not how to build one (pipe with two halves and a bit explosives is enough for a few kt) but to get enough Plutonium. You know, the whole thing with Israel running secret facilities with ceramic centrifuges for years. What US and China are wasting a few MW computer center each year on, is getting a bit more out of it than the competition, especially fusion weapons. Seen rationally, it's a childish "i have the bigger dick boom".