I’m pretty sure if they actually bought that many yachts, you’d instead complain that they’re polluting the environment with all the yacht-buying and also they’d waste a lot of human labor on products which aren’t really essential to society at all.

But yeah, your view makes sense from an economics point of view. The rich typically don’t spend their wealth, but hoard it instead, which doesn’t cause workplaces and therefore workers don’t find jobs.