Hunter gatherers actually worked far less per day. Usually about 12-19 hours per week, and most often that was done in a couple of days.
but their quality of life is by far lower than the modern day average person.
They can only eat what they can hunt. People today can eat basically all kinds of foods (see if a hunter can get seafood if they don't live near the sea).
Saying that a hunter worked less per day than a wage earner today is only true if one doesn't consider the output, and the resulting wealth created.