That just looks like a very sound argument for all the reasons I currently have for living on this planet to strive for escape velocity at about the same time as I do. I am very thankful for exoplanet-searching astronomers, various open source robotics projects, and for the decreasing cost of payload to low orbit, but so far I don't have quite enough billions of dollars it would currently cost to make a break for it.

I must admit that I am somewhat curious to see how the IRS deals with planetary emigrants. If you live on Mars, is breathable air considered income?