I was once in a similar position: company merger and they decided to move support offshore. We got 6 months lead notice and generous severance paid out as long as we stayed to the end. Fast forward a year and they took 85% customer approval to 13%. We got hired back at 1.5x our old pay rate, so not quite the 3x you mentioned. Hoping this works out similar for you in the end.
oi look at the brain on this one!