You don't need adoption to get inheritance or personal services. Nor it is a solution to a risky transaction. Work contracts are always at-will, to avoid slav

You don't need adoption to get inheritance or personal services. Nor it is a solution to a risky transaction. Work contracts are always at-will, to avoid slavery. You don't ever want people to be forced to work. Children don't get inheritance by right. They only get it by default, if the deceased failed to specify a will -- which they can change any time, so long as they are competent. Agreements of whatever sort to take care of someone for x years in exchange at the end for Y compensation have huge risk that Y will not be there, for whatever reason. More generally, the main driver for adult adoption is to game the system that privileges in-family transfers of wealth. The just thing to do would be to remove all benefits associated with family transfers. There's no social benefit to them, and they likely cause intra-familial coercion.