One can possess a much less mindless sort of social concern. It would want everybody, regardless of what motivates them in life, to have the best chance of finding an adequate living. Even Clinton's White House economist, Joseph Stiglitz, has argued that taxing away the estates of the dead rich only make the living rich richer and the poor poorer. It increases the returns to capital by making capital scarcer, capital being the engine that creates job and income opportunities. And Nobel prize winner Franco Modigliani has shown why growth is a far better leveler than the punitive taxation of bequests.
All wealth is inherited wealth in a static economy with zero saving.
Now the average heir would bequeath his descendants 2.5 times as much wealth as he inherited himself. Andrew Carnegie's argument was that large inheritances are corrupting. In spite of this bit of wisdom, the truth seems to be that the scions of the rich are wastrels in about the same proportion as the rest of the population. This comes from the Michigan long-term study of income dynamics. The rich are different from the general population only in that their bad habits are more likely to be covered by the tabloids.