Again the top 1% of the population owns 38% of all the wealth. This is a higher proportion than the top 1% of any other developed nation. The US ranks more with Mexico and Portugal in this respect.
This is NOT a healthy thing for a country. A middle-class country is by definition, a stable and prosperous one. A country that has a highly skewed distribution tends to be unstable, corrupt and poor.
Perhaps BT and his billionaire buddies think taxes are like getting mugged, but when the income gets too skewed, what you have is revolution, and then you have kidnappings and murders and the sort of stuff that has plagued Colombia since 1948: a constant, unending civil war which benefits no one.
Progressive taxes are the one way that those who have benefited far beyond their labors can pay for their good luck. And no, it is not talent that allows louts like Carl Icahn and Donald Trump to get ahead. Mostly it is having been born rich and then gotten lucky. And there are hundreds more guys like Trump than there are like Bill Gates and Steve Jobs.
People live better, live longer and enjoy life more in places like Denmark, Sweden and Finland than in the US. Swedes, Danes and Finns are luckily not the braggarts that some Americans are, and have never sought to spread their governmental systems by force abroad. It's not like the US has been at all that successful at it, either. Observe how long it took Taiwan, South Korea and the Philipines to become democratic.