Why can't you publish multiple salary ranges per job post (level 1: $X1 - $Y1, level 2: $X2 - $Y2, etc) or multiple job posts (one for each level)? Neglecting

Why can't you publish multiple salary ranges per job post (level 1: $X1 - $Y1, level 2: $X2 - $Y2, etc) or multiple job posts (one for each level)? Neglecting to publish a salary range seems more like a negotiation tactic on behalf of companies of not wanting to be the first to name a number. Either that or you know your company can't compete on salary, which is my typical assumption when it's a company I've never heard of and I don't see a range provided.