I am not arguing it is morally wrong for a wealthy child to spend their wealth. I am talking about the whole of society. It's really very annoying of you to persist in strawmanning me in literally every coment. Sure I used negative words to describe an entirely hypothetical person, but the reality is that people exist on a range of productivity.
let me switch to a tangent. You seemed to be concerned with making a wealthy society, where at least some people have wealth, right?
In order to do that we have to ensure that its worthwhile for a talented person to work hard. When someone cannot become wealthy no matter how hard they work, why would they work to make anything in this world?
and so society suffers. The way to make people work to make things, is to reward them for doing that. This is an economic reality, and is demonstrable, there are many economics papers on the relationship between income inequality, gdp growth, and income mobility. Suffice to say, no matter who you are, its in your interest for there to be more mobility, and for inequality to be in a certain range (not too equal, for incentive, and not too unequal, it causes dramatic negative outcomes like crime, unrest, addiction, violence)