The top 10% pay 65% of the income tax. An accross the board tax cut would in theory not change the relative proportion of tax burden.
As for overtaxed, I believe every income category is overtaxed.
Yes, but the issue is: Can an across the board tax cut disproportionately benefit the top 10%. The analogy and you say "no." I say, "yes" if:
1. the top 10% makes more than 65% of the income (or are otherwise deemed to be currently underpaying, for that matter); or
2. other taxes not involved in the tax cut are less progressive than the income tax.
Conversely, if the opposite of the two statements above are true, then the top 10% is benefitting LESS than proportionately from the tax cut. SIMPLE MATH introduced to demonstrate that the analogy is nonsensical (a point that you have already agreed with). Therefore, I will drop the subject regardless of your response.