This might be a mistake. On one hand, the beauracracy to manage the small income revenue might cost a large fraction of the revenue received. On the other hand, unless everyone is participating in the pain of paying taxes then a government dependency class develops that insists that everyone should pay more taxes.
This IS a mistake. The taxeaters would have little or no skin in the game, and the Ds will buy votes by pushing the 0% bracket up.
OK should get rid of the income tax and rely exclusively on a retail sales tax. That way, everyone pays, including Obamalini’s voters and illegals.