What sounds ludicrous about “Downsizing” is ludicrous.
But something bigger looms behind its high concept premise.
Its set in a near future where a scientific advancement allows people to be shrunk in size and live in a miniature ecosystem that resembles the larger world at a smaller scale, in order to save the dying planet. It is also potentially lucrative: if you are a thousand-aire in the regular world, you are a millionaire in the smaller one.
But people are not equal there either.