> Won't the inheritance stop their children working so hard?
Any evidence of the income from labor of children that came from wealthier family is very likely to point that the highest income jobs go to people with richer parents. That points to the exact opposite: the inherited capital allows them to pursue higher education and more perfectioning of skills, even if they dont need that labor.
But even if at some point of inheritance, people developed a significant dissuasive to work well paying jobs, it would be a drop in the bucket. The labor of the people who's inherited capital allows them to never work, and not only that but never for their children to work, is not a significant population and clearly, managing the capital is worth a lot more than their labor.
But lets say that even then, we want to squeeze as much as possible. Why stop at life? Lets just confiscate everything at any point in a mans life: someone that IPO'd and made 50 millions by 30y-old is tempted to never work by that same assumption, shouldnt we tax it all away? Of course, we know that taxing in that way is not only not to the liking of many, but it has economic consequences. SAme with the inheritance tax.
> Isn't spending better than hoarding for the economy?
I need more context for this, im not sure i get it. Spending by itself is not good for the economy, its actually terrible. Frivolous spending is not good for the economy: it creates jobs that have limited use beyond basic wealth transfer. If you spend your money on maids and people to afford luxury to you, once the capital is spent, all that value goes with you when you die. But if that capital goes into something that lasts after you perish, the economy gets richer. For example, if you buy 200 cars, at least after you die ,there are more assets in the overall economy.