Spoilers please: will this story avoid the harem the synopsis and setting seems to be set it up to (ie. being a renai comedy where the proclamation makes her spend more time with him, without any ntr elements from girls actually managing to seduce him), or will it be exactly as the synopsis makes it sound? I were wondering what exactly his achievement were, but the way it ended gives me hope it might be the former and actually end up an enjoyable read.
edit:
@Dudley did it explicitly state it only works for men? I skimmed those parts to get to his achievement. Though I do remember it mentioned "to reduce the number of singles", so it might make sense that it does work that way if it is post-war with a resulting skewed gender-ratio.
2. I would imagine that the wife's income matters, as it would be considered part of the family's income. Though if they explicitly stated that it doesn't, I could imagine it is because they expect divorces (and if the high-income wife leaves, the others are left destitute).
3. probably case-by-case, like irl. I imagine that custody favours the man if it is a high-income clause relationship, and the mother if it is one of the low-income ones.
4. probably loses the right to marry further. Might receive a stipend from the state, if the low-income clauses do (mc's case suggest they don't, as his reward seems to have been a one-time thing meant as a
reward for his actions)