Actually they do have plans for it.... Really long term plans for it, it seems. As the original 2013 joint statement that first said India and the US would work towards allowing Indian citizens access to Global Entry, said the benefit would eventually be reciprocal as the US helped India develop its own trusted traveler program. All the agreements the US has with other countries has similar language, which is why US Global Entry members can apply for membership in the trusted traveler programs of South Korea, Germany, Netherlands, et al, and program members who are citizens of those countries can apply for Global Entry.