You don't. In their minds, if inequality is what the Holy Market wills, that is what should be.
Except all those claims are false and you should feel bad for falling for propaganda.
Farms already have a double size exemption, meaning they can pass down up to $11 million of farm property without paying a cent in tax on it. And only amounts above that are taxed, so if you has $11,000,001, you only pay tax on $1.
Furthermore, you're telling me that someone with $11 million of property isn't rich?