"Like with everything else in government: through taxes, with rich people paying more."
You've lost your credibility here.
Avoid being paid in rials.
I believe that India would be better served developing more reliable and robust power and water utilities because it would:
-Drive healthcare costs down
-Increase productivity in the Indian economy by giving industry what it needs to thrive, namely power and water
-Ensure a greater portion of the money is spent domestically, rather than a supercomputer which would involve significant foreign remittances
-Create a stable environment to attract foreign investment