never

Yes

Communism or slavery.

Most likely many black men had no or very little wages after slavery was abolished. The highest wage was likely only several cents per day.

Wage slavery refers to a situation where a person is dependent for a livelihood on the wages earned, especially if the dependency is total and immediate. The person is working but not making enough money to live so they need to work other jobs to make ends meet. The person can't quit the job because they need it to live. This is wage slavery.