I don't know if it qualifies as "inspiration" but the rationale for the confinement of the families of the Kommandoes (Dutch farmers mostly, who were engaged in guerilla warfare against the British army) was to prevent any material support to the Kommandoes by family members. Some say that they also served as hostages but I've never found anything to support that.
I take you at your word about the Egyptians, and I'm sure that such things have occurred many times in history. I don't think Antinomians comparison to Indian Reservations is apt, but I do think that the camps where we confined the Nisei Japanese in this country would be.
Have a good weekend.