"Downsizing" with a big budget

Alexander Payne (Sideways) is said to be finishing his script Downsizing. The film is set to star Paul Giamatti as a man who decides his life would be much easier if he could make himself smaller, so he begins a process that would shrink him. In this social satire Reese Witherspoon plays one of the people he meets along the way and Sacha Baron Cohen will play a tiny foreigner.