The perverse neoliberal economy that's ruling the world is creating mass unemployment, which is probably at the origin of all the problems related to work, since it makes people accept the disappearance of their rights in order to get a job. The picture is an empty street upside down, the rotated man on the icon above falls down the abyss… The sentence contains the rhyming words "warning" and "working", and it's the negation of the conventional 'work in progress' sign.