I don’t understand the problem you’re trying to solve.
If you just like the aesthetic of cash transactions and want to see more of them, you could just mandate all brick-and-mortar retail stores only accept cash.
If you want to save people the hassle of doing tax paperwork, and offload that to banks, that’s also easy: just mandate that banks offer for free the service of filing taxes for all their customers. If you have accounts with multiple banks, they can coördinate.
If you want to stop high-frequency trading, just ban it.
I don’t understand the problem you’re trying to solve.
If you just like the aesthetic of cash transactions and want to see more of them, you could just mandate all brick-and-mortar retail stores only accept cash.
If you want to save people the hassle of doing tax paperwork, and offload that to banks, that’s also easy: just mandate that banks offer for free the service of filing taxes for all their customers. If you have accounts with multiple banks, they can coördinate.
If you want to stop high-frequency trading, just ban it.