There is a kernal of validity to your point, but let’s not pretend like those things are at all the same. The difference between copyright violation for personal use and copyright violation for commercialization is many orders of magnitude.

Well, yeah. If you’re self employed, you have to report yourself too.

A flat tax is a poor tax. 5% of your income means WAAAAY more to someone working minimum wage with two kids than someone who has a second home, even if dollars and cents it’s way less. And the wealthy will evade a flat tax as much as they already do a progressive tax.

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It should also be noted that if the vast majority of people do nothing special on their taxes and just accept the government’s assessment, then that leaves a much smaller group of people to be audited. And a much larger portion of those people will be those who are trying to weasel their way out of paying their share. Right now, with the IRS being criminally underfunded, they only focus on low hanging fruit, the small fries. With those people being boiler plater auto-accepting tax payers, that would mean the IRS has no reason to audit them and can focus on the big boys where the real cheats are. That’s another big reason we do not have that sort of system and why the IRS is currently so underfunded (despite every dollar spent on the IRS generating between 5 and 9 dollars in revenue from tax fraud/evasion). Those kinds of people pay to make sure it doesn’t happen.

They should (and do?) have the same information your employer, bank, or brokerage files. i.e. the same forms you use to fill out your taxes now. They know what you contributed to you 401k and your other retirement accounts.

Right. Filing taxes should only be necessary if you have itemized writeoffs or wish to contest the IRS’s statement of your tax liability. They already know what you earned their your employer, what’s been paid in taxes, what basic credits your qualify for, etc. They know what you owe so long as you didn’t have expenses to apply for that they couldn’t assume or know about. The only reason they don’t already do that or, at least until now, have a free public system for filing, it’s because tax companies have lobbied for decades to be able to milk the public for cash to help them file and navigate their tax liability.