OK, but private businesses in the US are not public jobs programs, and shouldn't have any obligation to keep paying unproductive employees.
That puts a financial strain on the organization, and can be toxic to a healthy work environment.
(For the record, I'm not railing against people in that position - I'm railing against people perfectly capable of working productively, but choose not to because there is no consequence. It would be analogous to government jobs where the worst that happens is you're transferred to a different department and become their problem instead.)