(3) Increase the estate tax to 100% of any liquid assets valued at over $5 million, adjusted for inflation, including stocks, bonds, and cash. This requires a complete overhaul of estate and gift taxes.
(and)
Coming into riches merely because one's ancestor dies is the antithesis of the American dream. It is repugnant for you two to even suggest that the money was earned in any capacity. Furthermore, we're a republic, not an aristocracy.
note: his position may become more clarified, but given that we're in the present, we'll deal with that later.
My position:
It may not be the case that a change in the rate of the estate tax will change the shape of the American, Modern aristocracy. The more intelligent will find substitutes to avoid the 100% estate tax, thereby maintaining the possibility of the status quo (i.e. the modern aristocracy). My concern is about the relatively poorer people and/or less intelligent who cannot easily find or afford such substitutes; therefore, the relatively disadvantaged will take a proportional hit to their wealth while the shape of the modern aristocracy remains more or less unchanged.
Even if a cap on the estate tax was imposed (e.g. <$1,000,000 in wealth will not be taxed), the modern aristocracy can still more or less maintain the status quo since they have the resources to circumvent a 100% estate tax + the $1 million exemption.
tl;dr. A 100% estate tax won't get what TGD wants.