I think you're right on how the policy works, but look at the math. The standard deduction doubled, so as an equation
New_deduction > old_deduction+school supplies
And they come out even more ahead if they stop buying classroom supplies.
no argument there. Would you agree with me that it'd be better if the schools provided all the materials that a teacher needs, instead of them paying out of pocket for supplies?
I'll sometimes pay out of pocket for work supplies but I just get reimbursed so it's no big deal.
I would if the source of the funds remained at the federal level.