No estate taxes mean Economic Absolute Monarchial rule

If you eliminate the estate taxes, scions of the uber wealthy will marry other scions, and thus, money will coagulate among a relative few. You want a loan to start a business? You need to ask Johnny Gates-Zuckerberg-Bezos for the money. Or, even worse, the Sam Walton XIV could lead us into a war somewhere.

Democracy is extremely fragile, esp. in the US where money dictates our politics. Imagine if the majority of our money is in the hands of a few families.