John Gill Commentary Esther 1:16

"And Memucan answered before the king and the princes, Vashti the queen hath not done wrong to the king only, but also to all the princes, and to all the peoples that are in all the provinces of the king Ahasuerus." — Esther 1:16 (ASV)

And Memucan answered before the king and the princes Who was the last, and perhaps the least and the youngest of the counsellors; it being appointed by the king, according to the latter Targum that when his counsellors sat, the least should give their counsel first; just as puisne judges, and the youngest peers with us, give their opinion in a case first: Vashti the queen has not done wrong to the king only, but also to all the princes, and to all the people that are in all the provinces of the King Ahasuerus ; he means, by setting a bad example to their wives, as after explained; it is an exaggeration of her crime, and made with a design to incense the king the more against her.