I wonder about the ethics of a related scenario ... get a remote person to login to machines to do installs and manage. In this case, the remote person gets paid in Rs but I guess that is okay since their cost of living is in Rs (not in the case of the story, obviously)?
Please try not to ask such difficult questions. It takes some serious mental gymnastics to justify and endorse all the various restrictions of free contract and conduct legislated under the name of social justice - it's really not kind to point out these uncomfortable contradictions.
IANAL