Is it better to force poor people to work in farms to survive? In a world where a large number of ‘modern’ westernized countries have active military conscription for young people, I don’t see this as being worse than that, either. The thing with slavery, is that it is lifetime, unpaid, terrible conditions, based on a feeling of superiority, only for the targeted groups, etc.

Of course, the better solution is just to treat farm workers fairly and pay them well, and work on automation at the same time. But rich people were forced to work in farms too, the conditions would probably get a whole lot nicer for everyone involved, and it would probably create a pretty big incentive to start automation as well.

edit: to actually be fine, it would have to be run by the govt. on nationally owned farms, like schools are, for workers to be paid and well treated, and for rich people to not be exempt