The Great Swindle 1948

A man can't understand why prices on everything have suddenly risen sky-high. He mentions it to his grown son, and is told that the main reason for the price hikes on everything is monopolistic business practices that push prices artificially high so companies can make bigger profits. The main is somewhat skeptical about that, so his son takes him to his local union hall, where he learns that his son was indeed right, and is also shown how the union movement can help to bust these price-fixing conglomerates and bring prices back to reality again.