Maybe I’m wrong about this, but I don’t think a government can ever grant “immunity” up front like that. The state may indemnify the lessee in certain cases of liability, but I don’t see how a blanket indemnification could ever stand up in a court of law.
Pick any other well-connected government contractor or "partner" and tell me how many times they have been successfully sued for some venture related to thst partnership or close contract relationship.
Legally, what you say may be perfectly correct. However it is also illegal to come into this country illegally and claim benefits intended for U.S. citizens. How well are those laws working out?