Taxes have multiple purposes and it is important to adjust them for multiple objectives.
For example, gasoline (or carbon) taxes are often denounced as regressive, but this misses the point that such taxes would have important positive public purpose. The regressive nature of such a tax is solved by making concurrent changes elsewhere, e.g. by making payroll taxes less regressive.
I don’t think OP is looking for more regressive taxation; he just wants to eliminate the many drawbacks of the income tax, replacing it with other taxes with approximately the same net progressive/regressive level. I agree this would be good, but it isn’t clear how. Taxes on luxuries would not be enough. Big taxes on real property would help, but there are other ways.
Unfortunately, to avoid confusion a phase-in period might be needed with income tax phased out over several years, with the new taxes phased in. During the transition phase there would be twice the bookkeepping :smack: – probably a good reason this will not come to pass.