The Dust bowl was a useful historical distraction/propaganda by the US government to hide their agricultural economic policy...whilst people starved.
I'm certainly no expert on that era, but it was a different time. Charity for the poor and hungry was typically expected to come from the private sector, not the government.
Although it's true that the AAA policy was to reduce the supply of agricultural commodities, after the public uproar over the wasted 6 million slaughtered pigs, the Federal Surplus Relief Corporation was then formed to collect the surplus foodstuffs from farmers and distribute them to aid agencies. So, although reducing the supply of food on the open market on one hand, they were also dramatically increasing the supply of food distributed to the poor on the other--food that the poor would likely not get otherwise because they could not afford it.
A modern vestige of that program would be the free or reduced school lunch program in public schools, where surplus food supplies or subsidized foodstuffs are bought by the government and then distributed to needy children in our schools. In my home state of California, 55% of school age children are eligible for free/reduced school lunches. In Los Angeles County, that figure is higher, at 2 out of 3 students.
The decline in food commodities prices started before the droughts of the 30's that led to the Dust Bowl. It started sometime in the 20's when global commodity supplies were in surplus, before the stock market crash of '29 and the onset of the Great Depression. The droughts during the Dust Bowl era actually helped boost the prices that farmers could get by reducing farm output, but even then, prices were still lower than the pre-20's prices due to excess production available on world markets from other countries.