The same laws?
Yes, exactly the same laws. If you think the system is loaded in favour of content creators, you are as free as anyone else to create new content of your own and benefit from that system if you can. Millions of people make their living this way and billions benefit from the results, so it's not as if this is some crazy niche rule, nor one law for the rich and another for everyone else.
Show me one single group of people who can work once and milk it forever.
Well, pretty much any investment-based business works this way. Landlords who rent out their properties are probably the most obvious example. However, I don't see how any of this is relevant to the matter at hand.
In practice, significant income from works under copyright rarely lasts for more than a relatively short time after the work is released, and of course even that is not guaranteed. Creating the potential for that income, and thus an incentive to create and distribute new work in the first place, is the main effect of having copyright laws. I suspect we would agree that the duration of copyright protection has probably been extended far more than it should have been, but the benefit of that extended protection is mostly illusory anyway.