Edit: I heard another argument that was something like, "They were gonna go to New Zealand and never bother Walt again." Yeah right. They would have spent all that money on their habits and then they would have come back to Walt for more cash.
they are going to New Zealand just like how they said they were going to throw away what they have left and get clean..
also she said shed go anywhere as long as was the two of them, well no shit its his money!