Everything is generated "by the hard work of other people". And don't forget that by the time "the heirs" inherit stuff, it's already been taxed 3-4 times. The understanding of this, however, only comes when you have children and wealth of your own.
Until then the situation is best summarized by this meme: https://pbs.twimg.com/media/Dypf0KDWkAUyNdn.jpg:large