Something that I’ve often found helpful is to ask someone exactly what the perfect “distribution” of wealth would be. Do they *really* want everyone on Earth to have the exact same amount of wealth? Why or why not?
If you can get someone to admit that they don’t really know exactly what the right distribution is, then all of a sudden their complaints basically fall apart. “Well I don’t know what the right level is but this is too much” isn’t a well reasoned argument, and it shows.