Everybody in politics claims to want to get everybody out of poverty. What's the opposite? Wealth. And what is often criticized by the left? Wealth.
Socialism and communism are set up so that a select few elite get most of everything and the rest of society is equally miserable in poverty and oppression. So if you can be in the ruling party elite, socialism, communism, you've got it made. That's less than one half of one-tenth a percent of the population in those countries.
Poverty is not the root cause of crime.