If you look at the tomb paintings domestic servants and slaves went barefoot. Ancient Egyptians generally went barefoot even the Pharaoh. When they did wear shoes it was normally sandals made from papyrus or leather. They were only worn on special occasions or to protect their feet.
Victorian Servants, who worked for the rich, usually wore white, long- sleeved shirts and black trousers. On top of all those CLEAN clothes, they wore an apron when cleaning, cooking or serving.
research has proven that in the future, people would get bored of clothes and just simply cover their privates instead, so they would probably do that, the research has taken place in Yale university
Which old days? Who's servants? It really depended on those two elements. Slaves were servants, and personal assistants are the modern servants. As you can see, there's a huge difference between the two, and there were servants that did everything you can imagine at some point in history.