If somebody weights 200kg: The right solution is to lose weight and eat your vegetables; not to "devalue" the Kilogram.
You got the boundary on the price controls wrong. They mandated minimum prices, not maximum. The minimum was more than enough to pay for shipping, but it was higher than the amount people could afford.
FDR believed that the depression was caused by excess production. The federal govt destroyed food and other things to reduce supply in an effort to drive up prices.
That didn't stop until WWII was imminent, when it became obvious that the US couldn't be an "arsenal of democracy" if it wasn't producing as much as it could.
This war on production is what made the great depression "great", that is, long an deep.
To be fair, these FDR policies were extensions of what Hoover had done. Interestingly enough, FDR campaigned against them.
But popular historical judgement seems strange anyway. Just look at English kings.
Alot of that going around these days too.
While price controls of food cause problems, they sound really good to voters when there is a recession, and thus they sound really good to politicians.
It's not because a looser monetary policy could have helped during the great depression that it will help in every situation.
It's more likely they will be bailed out by the more fiscally sound countries.
That is all politicians EVER care about. No exceptions.