That is sort of lame, trying to draw comparisons between slavery and mineral rights. For one thing, a slave is a human being whereas a mineral right is only a rock or oozing crud underground, an inanimate object. Also, the owner of mineral rights is a helpless pawn of forces out of control, quite similarly a slave of the government, rather than in control of the governing of that. And then you would add insult to injury. It just isn't fair.