I’m with @tinyfaery, @Jack79, @YARNLADY and @RedPowerLady. Encourage the behaviors you want. Ignore those you don’t like, or just say you don’t like them, and leave it at that. Treat kids with respect, and they’ll learn to treat you with respect. Treat them like slaves, and they’ll treat you like masters.
I have to say, I don’t quite understand what you mean by “the last word.” Are you arguing back and forth, like “Do this!” “I won’t.” “yes you will!” “No I won’t!” Etc, etc? Or is it something else? I’ve never heard this term used in interactions with children, before. I see it happen on fluther, when no one can bear to break off an argument without giving their argument one more try.
I tend to listen to my kids, and if they say something that makes sense, they can convince me to change my mind. We don’t argue (or what I consider to be arguing) all that much. They certainly don’t always do what I think they should, and they’ll do things that other people probably think is disrespectful, but when we’re serious, they comply, and are probably grateful for our help.
My son is not big on stuff you have to learn to be polite company. He doesn’t like to help clearing the table, or using his napkin. Little things like that. They don’t bother me, because I was the same. I learned. My parents, apparently, are much more strict, and therefore, oddly, my kids prefer us to their grands. I think I should tell my parents to go ahead and spoil the kids. Isn’t that what grands are for?
Anyway, I think it’s a parenting philosophy, and it’s kind of hard to learn if you’ve been doing things another way. I think most of the problem with children is with us. They give back what we give them. My son is nine. He’s very loving and affectionate, and he’s a tough kid at the same time. He is a whiz at piano, and amazing at drawing. He says he doesn’t like to read or write, but I see him reading, and he seems absorbed. I dunno if he’ll ever like writing. Until he types, anyway. He’ll give me sass, as will my daughter, but only when I’m willing to take it. As soon as I get serious, he stops, and gets to work.