This is great, for the government. The average person that uses this will just let it fill in the boxes, without even trying to look for anything that might save them money.
Can you demonstrate that this system will be implemented in a manner where the taxpayer will receive a less favorable outcome than they would've filling out forms themselves?
The IRS has all of your financial data from various forms, why would they make your outcome less favorable? Their job is to enforce the tax code, not write it, nor collect more taxes than would otherwise be due.
TurboTax doesn’t make you pay until the end when you file. Could you put everything into TurboTax using its wizard/conversational approach to see what your return should be and then file using the free tool? I know the average person will do whatever is low effort but that is what I plan to do.
The IRS has all of your financial data from various forms, why would they make your outcome less favorable? Their job is to enforce the tax code, not write it, nor collect more taxes than would otherwise be due.