To get more concrete, if you have a charitable trust of the kind described in this article, then it will pay out salaries to employees and purchase various kinds goods and services. The recipients of those money flows will in turn put that money to work for their own ends: supporting a family with food, shelter, etc, paying other employees further along the value chain, acquiring other goods and services, and so on.
If someone accumulates this much wealth, they are well within their right to put it to work however they please. And doing so does not induce some permanent dysfunction in the system. In this case, I would argue that what the Patagonia founder has done is immensely commendable.