Spending our tax money was the whole point of the program. There is no proven value in this "science". We have no tools that will prevent earthquakes. Of course, someone should calculate the amount of global warming gases and particular pollutant that was caused by the drilling. There is another study worthy of our tax dollars.
Just 20 seconds advance warning is going to help 75 million people in the affected area save their lives or avoid injury.
BTW, the whole business is a tad beyond "science" and has crept into "engineering application" ~ it's not like they want to discover what causes earthquakes, or that they can prevent them. After all, we know what "causes" earthquakes ~ the earth moves!
I say spend ALL the money on this project. Do thousands of boreholes. Drop in gazillions of measurement devices.