In spite of republican misgivings, southern slavery survived the post-Revolutionary era because?

In spite of republican misgivings, southern slavery survived the post-Revolutionary era because there were powerful economic incentives to forced labor.

Explanation:

In spite of emancipation laws bring passed after the war, they were very slow to take effect on southern states: many of them only freed children, for example. The economic system that the south had built required a massive unpaid workforce. In states where tobacco production decreased and no longer demanded such work, the free black population increased more rapidly than in other states, Meryland and Delaware for example. Legal modifications weren't taken seriously among whites of the lower southern states.