Why is banksy slave labour a real life situation ?

Answer:

Banksy slave labour a real life situation because the art work depicts an 'urchin child' at a 'sewing machine' assembling a 'bunting' of union 'jack patches'. The work was protest against the usage of sweatshops for manufacturing London Olympics memorabilia and diamond jubilee in 2012.

Explanation:

Slave labour is a mural that was painted by a British graffiti artist, Bansky on the side wall of a pound land store in 'wood green', London, may 2012.   Bansky is an 'England based street artist', political activist, vandal, and film director since the 1990s. His work was dealt with social and political themes which might include anti-consumerism, anti-war, anti-imperialism,anti-fascism, etc. His subversive epigrams and satirical street art combine graffiti with dark humour executed in a 'distinctive stenciling technique'. His works of social and political commentary have featured on walls streets and bridges throughout the world.

Answer is mass marketing.