2+2=5, it's the Five Year Plan! warning, orwell related!

According to Eugene Lyons book Assignment In Utopia, the slogan
"The Five Year Plan In Four Years" was expressed in a boiled down
version as "2 + 2 = 5" which was pasted on the side of buildings
and such.

And what did the poor innocent workers get for completing the
glorious Five Year Plan in four years? Another five year plan!
Shows you the 'Communist Work Ethic' as "our people like to work".