Pigs...

Human = eat + sleep + work + enjoy

Pigs = eat + sleep

Hence, Human = Pigs + work + enjoy

If, Human - enjoy = Pigs + work

In other words,

Human that don't know enjoy = pigs that work




Men = eat + sleep + earn money

Pigs = eat + sleep

Hence, Men = Pigs + earn money

If Men - earn money = Pigs

In other words,

Men that don't earn money = Pigs




Women = eat + sleep + spend

Pigs = eat + sleep

Hence, Women = Pigs + spend

If, Women - spend = Pigs

In other words,

Women that don't spend = Pigs




Summary:

Men earn money not to let women become pigs!

Women spend not to let men become pigs!

Men + Women = 2 Pigs

Wish all the pigs happy forever.