What would be the consequences of Downsizing on the economy? In the 2017 movie Downsizing, a chunk of the population decides to reduce their body size to just a few inches. What would be the consequences of this on the economy? I'd like to know chronologically what the important steps would be until the economy goes back to some stability.

In my scenario, the proportion of small vs big people in the country stays stable, let's say 50% of the population decide to Downsize, 50% stay normal-sized. I am considering an essentially free economy (let's say the current day US like in the movie) where trade between small and big people is initially not restricted, but could be in the form of laws or taxes later on.

(I do not have any background in economics, please make it as lay audience as possible!)
It would decrease consumption, lowering demand on many markets, meaning that prices would go down. If downsizing would rampant enough it's possible that economy would experience deflation, maybe even recession. As the result, maybe central banks would be decreasing key interest rates (i.e. make new debts cheaper), start buying bonds and lowering reserve requirements for banks in order to stimulate economy. While governments could increase government spendings, decrease tax burden and relax business regulations for the same reasons. Accumulation speed of government debts would be increasing (i.e. government would be borrowing more in order to finance their deficits caused by increased government spendings and decreased taxes). It would also make workforce more rigid, unemployed downsized people wouldn't be able to take some jobs. Like you can't take job of a burger-flipper at MacDonalds if you're downsized. Nations with downsized workforce would be able to offer lower prices while exporting their services abroad. Downsizing would be most widespread among countries with big service sector, like many deindustrialized and post-industrial countries. Imports of countries with downsized workforce would decrease, possibly leading to positive trade balance.