I'll try to answer the question, though I'm still a bit confused as to what is being asked. I'll assume you are asking
Would higher tax rates in the United States help distribute wealth more evenly?
It may. But taxes are a bit more complicated than that.
As others have noted many other developed countries have much higher tax rates across the board. In return, they also have a lot more socialized programs and industries (such as health care).
Based on the tax rates of other nations, and the lower wealth gaps they have, one could come to the conclusion that yes, higher tax rates can help distribute the wealth more evenly.
However, another option is to reconsider what is being taxed. In the US, the wealthiest tend to not have high incomes, as such, higher income taxes don't affect them all that much. Changing how we tax investments and dividends could be one way to improve things.
Yet another option is to change how we handle tax deductions, rebates and incentives in the US. It's rare for anyone to pay the actual tax rates, as most everyone is eligible for deductions of some sort. The more money an entity makes, the more likely they can hire creative accountants and the less likely they are to paying anything close to the listed tax rates.
Now, how practical those solutions would still be up for debate. In the US we've long talked about simplifying our tax codes, yet it hasn't happened yet, so may not be a very practical suggestion in the end.