First of all, the right wing is against the inheritance tax so they DO support allowing people who DIDN'T earn their money to keep it all. Secondly, if your numbers are correct, thirty percent of billionaires inheriting it is a large number. Finally, NOBODY needs to be filthy rich but, objectively, EVERYONE has to eat, to have shelter, to have clean water and air, to learn survival skills. As currently existing members of the human race, people have a right to a slice of this planet's resource pie. Yet, greed prevails in spite of their suffering.
We are not rats and roaches who live in a morally neutral world of competition, we are human beings. We know that we are bound by right and wrong as moral decisions, not commandments, and that robbing the poor in order to give tax breaks to billionaires is HIGHLY immoral. We know that. But, what the conservatives have done is attempt to forward the notion that issues related to money are to be considered absent basic human morality intervening. That's absurd.
Buckle up, right wing, your greed religion is about to suffer a forced reformation. This **** has gone on too long already.