Pope Pius XI
Quadragesimo Anno §65
Quadragesimo Anno: On Reconstruction of the Social Order
65 We consider it more advisable, however, in the present condition of human society that, so far as is possible, the work-contract be somewhat modified by a partnership-contract, as is already being done in various ways and with no small advantage to workers and owners. Workers and other employees thus become sharers in ownership or management or participate in some fashion in the profits received.
Source: Quadragesimo Anno (Vatican.va)