The problem is all that new wealth created, about 90% goes to the top 1% who can easily store it away in nontaxable assets (at least until said assets are sold) since generally the “buy tax” isn't all that high compared to growth in value of securities and real estate (at least good investments thereof). Just siphoning more money out of the poor and middle class will not fly in the USA you will be voted out and your policy rescinded within a couple of years.