Anarchists?

Why do radical leftists call themselves "anarchists?" They don't really want anarchy, they want an authoritarian government that shares their policies. Hardcore capitalism is simply the absence of government intervention in the economy, and the so-called anarchists are really anti-anarchists. They want lots of government intervention in the economy and forcible redistribution. Maybe they just mean that they believe in using criminal and violent means to achieve their objective. That just makes them thugs and criminals though, not anarchists. I would love to know how the term came to be used in a self-descriptive way by militant authoritarians.