The rich hoarded their money just like today. Just because the stock market crashed doesn't mean every rich person in 1929 lost all their money. Many, a wealthy man survived just fine and even bought up possessions of those who lost their wealth; becoming even more wealthy after the depression.
That's why socialism and communism was so popular during the 1st RepubliCON Great Depression. The working people saw their rich bosses doing just fine and felt they had been betrayed by capitalists.
The rich get richer because they are in positions of power and influence at the time of mass suffering. They use it as an excuse to feather their own nests. The filthy rich have always been a corrupt and selfish breed of people. Anyone who has almost unlimited resources and power gets corrupted eventually. Some sooner than others. Absolute power corrupts absolutely and almost absolute wealth corrupts absolutely. FDR was called a traitor to his class because he was trying to save all of America not just the rich.
This sense of self pity and haughty anger the filthy rich are showing is because they know they have done wrong and are feeling a tinge of guilt. They know they have gotten rich through corruption and theft NOT by hard work. They feel people are looking at them as if they are criminals. So like little children they claim they have done NO wrong while eating their stolen cookies.
The Welfare Queens and greedy poor are smoke screens the filthy rich and powerful throw out. See, look over there is a person you can get your hands on and blame for this mess me and my rich buddies have created. While you are looking over there, you wont notice who is really stealing your nation's wealth.