Everyone should be able to read private politician's correspondence and what they are up to. We should also know their bank accounts and their location at all times. Why should government know those things about us but we can't know that about them? That's a modern slavery.
Everybody should be able to read the private correspondence of politicians? That's absurd. Politicians are (believe it or not) people too, and have families, and relationships, and private lives. We should absolutely be able to read all their work related material, but private things should stay private.