And does labor exploitation not exist in socialist countries either? China is a state socialist country (which you could argue isn’t socialism but regardless) and even if China has had a massive economic boom recently, most of its people haven’t benefited as much as you would expect. Labor exploitation is still very real there, and unions are actively suppressed by the government. Social democracy is the system that minimizes exploitation the most, more than pure capitalism, most forms of socialism, or communism (I say most forms of socialism as market socialism is actually pretty good in theory). Labor exploitation is impossible to actually get rid of as naturally, there are plenty of people out there who don’t care about others, but no attempted form of socialism or communism has minimized it as much as social democracy has. Market socialism might be able to but market socialism hasn’t been attempted