Yes, but you also need to look at the products of those people's labor and other things that labor could be used for. Do we need more people building and crewing luxury yachts, or building and operating hospitals and sheltered accommodation? In both cases people are paid to do work, but the products of that work are very different.
But in practice much of the wealth of super-wealthy people is actually either tide up in the value of the businesses that they own, which are often doing economically valuable things, or is invested in useful enterprises (shares), or funds useful activities (bonds). It's not as though the net wealth of Warren Buffet is all being thrown on hookers and blow.
There are already ways to direct the spending of the wealthy towards more productive uses, such as consumption taxes on luxury goods. But if they take their wealth to other countries with laxer consumption taxes, there's no a lot we can do about it. So we're back to the libertarian argument. At some point you get into questions of freedom and individual rights.