How about buses, trains, boats, and airplanes?
What part of "affordable, on-demand, point to point, weather-resistant transportation" did you not understand?
Or is the ISS getting so old - seals are starting to leak, parts are getting brittle with age and the harsh environment of space - that it's safer to ditch it than to continue to use it?
All in all, it seems like quite a waste to splash a hundred and fifty billion dollar microgravity research station, especially when they're planning on adding new modules to it next year, and in 2017.
In fact, forget the station.
When it comes to RTGs vs solar, the basic rule of thumb I've read is that solar is good sunward of the asteroid belt, and RTG is better outward of the belt.
NASA is almost out of Plutonium.
... and I'm almost out of ketchup. However neither has any bearing on ESA's Philae mission.
In the UK, national trading standards laws trump point-of-sale contracts in retail transactions.
Laws trump contracts pretty much everywhere and in every circumstance.
Is your car driven by someone who has passed a criminal background check?
Is your car required to have snow tires?
It's about more than mere automobile safety.
Then explain why every apartment complex will refuse cash and tell you to go get a money order to pay your rent?
There are security issues with handling, storing and transporting tens or even hundreds of thousands of dollars worth of cash that the apartment complex would rather not deal with.