Great proposal, but it doesn't go far enough for my liking. The cornerstone of my political policy has been for years now, 100% inheritance tax on all estates valued over x amount. I haven't decided on what's a reasonable amount. Personally I think $1m is plenty, but sometimes people can have five or six kids and then that $1m doesn't seem all that much. $5m perhaps.
Even at $1m that rules out at least 98% if not higher of the population. $5m would make it over 99%. So it really makes no sense for people to oppose inheritance tax. Almost certainly, you will never be penalised by it; whilst certainly, you and yours will benefit by it. All the money raised by inheritance tax should be ploughed entirely into fixing the education system, such that ten or twenty years from now, the worst government school in the country gives as fantastic an education as the best private schools used to provide. It is not a tax on the dead, it is an investment in the future.
The only people who will oppose such a scheme are either the power elite or shills for the power elite, or those who are delusional enough to think that they will one day belong to that class. This is because, like Robespierre said, the secret of freedom lies in educating people, and the secret of tyranny lies in keeping them ignorant. They want the public school system to be shyt. They don't want you to be smart, because then you'll buck their system of exploitation.