Being more cynical... deducting taxes from your paycheck before you even get the money is already (by design) lowering awareness of how much we are taxed. Imagine if we had to write a check to the IRS every month like we pay our utility bills...
Making your tax return a "click here" effort while on the one hand appealing has the disadvantage of further reducing your awareness of how much you are taxed.
This is why I do my taxes by hand, with pen and paper. I want to read the instructions and fill out the forms so I never lose awareness of how insane the system is.
The only two monthly expenses I still write a check for is the water and sewer. That does not stop me from realizing how expensive my mortgage, electric, etc is. Trying to save people from their own stupidity or ignorance by making them fill out menial former is not the answer.
Making your tax return a "click here" effort while on the one hand appealing has the disadvantage of further reducing your awareness of how much you are taxed.
This is why I do my taxes by hand, with pen and paper. I want to read the instructions and fill out the forms so I never lose awareness of how insane the system is.