The Quakers in New England in the 1800s were known for (1) being abolitionists and (2) whalers. They often bragged about employing freed and escaped slaves on their ships. It all sounds great when viewed through a narrow lens, but the whale boats had a system of paying the crew when they returned successfully. No whales, no pay. Yes, the Quakers would risk the cost of the ship and the supplies, but they didn't pay for the labor until the end ... and then only when the workers actually succeeded. The plantations had to capitalize the cost of the slaves upfront, a significant cost that often required large loans. Before the Civil War, places like New Orleans were big banking centers.
The late 1700s early 1800s British Army and Navy also drove a "famously hard" bargain when it came to the working situation of the former slaves they employed.