What would an Arahant experience, as a slave in a labor camp?
First of all, Arahanths never feel sadness, grief, hate etc. They  don't have wives, but they may have ex-wives.

if the Arahath has psychic powers he might fly away to spare the people from acquiring extremely bad karma or he might stay if he saw it as an unavoidable consequence of a past Karma.

Either way, he will never get upset no matter what happens. He would try to make the people come to their senses, if he sees potential in them to be better humans. Otherwise he'd remain in a meditative state when not attending to the maintenance of the body.