"free all your slaves now!"
seconds later
"they will die if we leave them alone"
...
While this manga is stupidly ironic for freeing slaves by supporting slave industry AND kidnapping industry, this chapter has a good point of how unrealistic the idea of "if X has good morality, he/she/it should've freed all the slaves immediately" is, especially in a large, nation-wide scale. It needs to be a gradual process