In all honestly, the conclusions drawn by the "socialist" authors don't appear to be that different from those drawn by Carnegie, who robustly defended the idea of meritocracy whilst being practically the embodiment of the self-made man.
We start, then, with a condition of affairs under which the best interests of the race are promoted, but which inevitably gives wealth to the few.... The question then arises...What is the proper mode of administering wealth after the laws upon which civilization is founded have thrown it into the hands of the few?
Men who continue hoarding great sums all their lives, the proper use of which for public ends would work good to the community, should be made to feel that the community, in the form of the state, cannot thus be deprived of its proper share. By taxing estates heavily at death, the state marks its condemnation of the selfish millionaire's unworthy life.
The growing disposition to tax more and more heavily large estates left at death is a cheering indication of the growth of a salutary change in public opinion...This policy would work powerfully to induce the rich man to attend to the administration of wealth during his life, which is the end that society should always have in view, as being that by far most fruitful for the people....
Really, you don't have to be harder or smarter working if you have the fortune to be born into a situation where you're in the top 1% of the population that are worth more than the bottom 90% (the article would benefit from some reference to social mobility though). That's not just a problem if you labour under the delusion that wealth is a zero-sum game; it's also a problem if you're one of us that believe that properly functioning and free markets ought to have a real, tangible link to what the mass of the population demands.