John Chrysostom, a fifth century writer on slavery. Can be said about capitalism as well.

"Social arrangements, like all laws made by sinners, acknowledge these class distinctions [between master and slave]. But we are all called to accountability before the law of the same Lord and Master of all. We are called to work goodness toward all alike and to dispense the same fair rights to all. God's law does not recognize any of these class distinctions...." (continued)