Why is it considered acceptable for women to wear sandals to work, but it not for men?

Why is it acceptable for a woman to wear a t-shirt to work but men must wear shirts and ties.

Why are long sleeve t-shirts acceptable for women for working but not men?

Why can women wear long shorts or short trousers for women but not men?

Why are women allowed to expose large sections of their chests at work but men cannot unbutton their shirts.

In hot weather, women often wear skirts and shorts to work, but men cannot.

Could this inequality against men be a reason why men tend to still get more pay?

Because of the hazards of being forced to wear what is effectively winter clothing during the summer?

Just a thought.