That's how most of the world does it and it works fine. And for businesses it can be just as is.
Its the insane burden and waste of time for the average person that is the problem.
Imagine how much more productive the entirety of the US would be if tax filing would be simple. The amount of time saved would be enormous, there are approx 140 million tax payers and if everyone would spend just an hour (in reality its probably multiple days) per year doing tax related work you get an idea how much time is wasted.
Its the insane burden and waste of time for the average person that is the problem.
Imagine how much more productive the entirety of the US would be if tax filing would be simple. The amount of time saved would be enormous, there are approx 140 million tax payers and if everyone would spend just an hour (in reality its probably multiple days) per year doing tax related work you get an idea how much time is wasted.