Yes, you are right, shalware qameez is "sleeping suit", instead we should've adapted chaddee and banyan (or "sweetly" nicknamed Shorts and T-Shirt) for "national dress".
Hey man! Not sure what this national dress business is anyways.
If you fancy chaddee, then wear it to your hearts content.
If at all, look at Jinnah our nation's father. He mostly wore three piece pin-striped suits. Sure on few occasions, he was fitted with Shariwani but most of his life he was the pant-shirt suit wearing smartest looking leader.
Shlawar kameez on the other hand was a tribal custom mostly worn by anti-Pakistan sellouts tribals like Maudoodi.
Too bad we in the name of false nationalism, left Jinnah's refined habits and adopted customs of uncouth tribals.
And look what happened then! Pakistan is now a jannat for uncouth tribals from all over the world.