Segregation is technically illegal, but if you look at a census map for 8 Mile Rd in Michigan, it’s all white people to the north and black people to the south. In other words, please don’t assume that injustices can’t somehow still occur within systems that, by the letter of the law, have done away with injustice. I don’t know how to epxlain to you that immigrants assembling consumerist garbage in the US probably aren’t doing it because they weighed other options and thought it was the best one... And if you think they can “just leave”, ask yourself why so many of them haven’t.
We don’t do that because it doesn’t make sense. How would that even work? Use the 2017 tax year as an example. You obviously can’t compute 2017’s taxes until the year is over. So how do you stagger? Is my deadline in January? That’s not really fair to me if someone else has a deadline in May.