http://wuphys.wustl.edu/~katz/scientist.html
In the link above, physicist Johnathan I. Katz urges those interested in science to ultimately chose something in another profession. At first I thought it was going to be tongue-in-cheek, but he seems to make pretty good points. One point he makes is that the best a PhD might be able to hope for is searching out postdoctoral work every two years or so, meaning there'd be a lot of moving involved.
I'd like to get some thoughts on this, especially from actual scientists. Do you agree with his assessment of a new scientist's chances of making a happy living?