It is of course a fake scientific study for comic effect, but it got the point across. Marxist have no sense of humor so I guess that was not obvious tho them.
Vietnam began allowing private ownership and free markets with the Đổi Mới reforms, launched in December 1986 at the Communist Party's 6th National Congress. it pulled Vietnam from one of the poorest countries to middle-income status in ∼30 years.