What is the correlation between Slave wage labor and American capitalism?

Like chinese child sweat shops, chinese building iphones and tech for cent an hour, chocolate coming from africa slave like work

I'm new to english and terminology but can you explain capitalism and the correlation of these things. Someone was talking about it saying, I don't think capatlism is bad but America does bad things in the name of capatalism and somewhere in the discussion i heard slavery, wage labor etc.

Let me guess, you read a blog and now you think you are an expert?