Great idea...your grandma who spends 80% of her income on medical costs will pay the same rate as Trump. And, she can live on nothing...but at least it is flat.
By the same logic, implement the “unfair tax” and force Grandma to choose between spending nothing (except on things that her government betters deem are her minimum requirements for existence), or having her fixed income taxed away at the cash register.
Kinda hot in that apartment, Granny? Need a new air conditioner? Pony up, bitch. Pipes broke in that last freeze? Pony up.
An important philosophical question is: should the “poor” (including Grandma) pay tax at all? Or should some in society — those chosen by their wise betters in government — pay nothing, and some pay more?
A reasonable flat tax IS a fair tax. Grandma needs defense and a highway system too. Why should she pay nothing?