Is 'To foster productivity (physical output per worker) and constrain supervisory costs, wages are paid on a piece-rate basis, providing incentives for rapid completion of the operation.' an autonomous statement, not logically connected to 'The supervisory costs tend to be quite a lot.'
To foster productivity (physical output per worker) and constrain supervisory costs, wages are paid on a piece-rate basis, providing incentives for rapid completion of the operation.###The supervisory costs tend to be quite a lot.