No, it doesn't. Look at the contents of the British museum and tell me, by dollar amount, who the biggest thieves are there. It's not the poor.
In the US, the biggest source of theft is time card theft from employers, followed closely by asset forfeiture (cops stealing). Poverty doesn't breed immorality, that's some classist bullshit.
Yeah that's ideologically creamy and everything but the rising cost of food has definitely led to me stealing it. I just don't happen to think it's immoral. If I see a food item I regularly consume literally double in price, at that point it's the seller being immoral. These kind of price hikes have become a regular occurrence, as well as the removal of budget versions of products from the shelves.
This isn't true and it's classist propaganda. The biggest thieves in this country are the wealthy, via paycheck theft, and then the police, via asset forfeiture.