@quinn I'd abolish the doctrine of corporate personhood (and provide for shareholders and directors to do jail time if the corporation they control are found guilty of crimes), put stringent limits on trusts, then add a wealth tax on individuals that erodes their gross assets—either by inheritance or on an annual basis—faster than capital accumulates.
Then look for the avoidance strategies and play whack-a-mole with them.
Needs international consensus and enforcement, though.
How about you?