I think a National Sales Tax is a terrible idea.
It would reduce the amount paid by the wealthy and increase the amount paid by everyone else.
It would create a huge incentive to increase black market activity.
It would encourage Americans to leave the country to make purchases and discourage tourism by foreigners.
I suspect that it wouldn't actually end up replacing the income tax. We would eventually end up with both an income tax and a national sales tax.
It would reduce the amount paid by the wealthy and increase the amount paid by everyone else.
It would create a huge incentive to increase black market activity.
It would encourage Americans to leave the country to make purchases and discourage tourism by foreigners.
I suspect that it wouldn't actually end up replacing the income tax. We would eventually end up with both an income tax and a national sales tax.
And I think the fairest way to do that is to tax spending (National Sales Tax). I honestly think that is a better measure of your ability to pay. If someone has $25 million in fixed investments making near zero (or stock not paying divs and no cap gains sales), and spends $1 million a year, they have more ability to pay taxes at the same rate as someone who had $1M income and spent $1M.