I don't really see the problem with the income tax. The problem is the different way that certain income is treated and the various deductions, etc. . .
Treat all income the same and have a progressive formula for paying taxes wherein all you have to do is plug in some numbers, maybe a deduction or two (dependents, for example) and pay the tax.
Additionally, the underlying basis for the inheritance tax is that the heir is receiving income and because it is income it should be taxed. If you do away with the income tax on what basis would you justify an inheritance tax?
Treat all income the same and have a progressive formula for paying taxes wherein all you have to do is plug in some numbers, maybe a deduction or two (dependents, for example) and pay the tax.
Additionally, the underlying basis for the inheritance tax is that the heir is receiving income and because it is income it should be taxed. If you do away with the income tax on what basis would you justify an inheritance tax?