During what people like you would generally refer to as the "golden age of the US" during the 50s -> 80s, the progressive tax on the wealthiest was around 91%. And they still managed to be insanely wealthy, and the country had lots of burgeoning social programs that benefitted from it.
Why exactly do you feel the need to defend the right to hoard money? What does that extra money do? Buy you a yacht? Buy you a media empire to control propaganda? Buy you a private island for your wealthy friends to "party" on? A measuring stick to satisfy your own incomplete metric of self worth?
What exactly do you need all that money for?