I'd love to, this is exactly the use case for digital technology; automate the stuff we can making more time for more meaningful taska for everyone. Finland is ahead of it's time for these kinds of integrations. Problem is, it requires a central authority having all of the data, and the US has absolutely zero trust in it's government to not fuck it up. With good reason
Absolutely would not work in the US (as, unfortunately, most public services). There's already a huge lobby from TurboTax and other players. All countries that got to this level of automation already had publicly developed, free software for tax payers previously.
How did you sleep last night? Your cynicism is slowing.
Just this year, the IRS started a direct file pilot program that flies in the face of "it absolutely would not work". It's not everything, but it's a start.