At a base level, what is the source for funds paid to a worker when not working (either by choice or illness) other than funds withheld from the worker when wor

At a base level, what is the source for funds paid to a worker when not working (either by choice or illness) other than funds withheld from the worker when working? The question is the same in Switzerland unless there is cave of sick pay gnomes next to the chocolate making ones. One might say the funding can come out of a different source, a popular go-to is "profit" or government, but all those are downstream from the value created by the worker.