Benignuman,
You are ignoring the main part of the issur. You speak of those who want no part of the treifine Medina, and your point with them is moot; they don’t take money anyhow.
They want to draft bochurim whose main objection is that he wants to learn, and you want that to be a crime punishable by loss of citizenship rights. Would you punish chillul Shabbos by taking away all financial benefits?