I think that if you did do that, you would want to recast the thresholds. I have to admit that I haven't done the calculations, and of course all of it would depend on the amount by which you want to reduce personal tax.
As I said in my comments, if you did bring in a restructuring of the federal fuel excise tax that raised a bunch of revenue, and some of it was used for reducing personal income taxes, then I wouldn't mind seeing a reconfiguration of the personal tax. Perhaps it could go down to three rates. It would mean recasting the thresholds, which could go up. It depends on how much revenue one wants to--