Shallow report analysis ....
"...while anything on Smalltalk or FoxPro should be junked or moved to a new system immediately as a result of non-support and no further development of the environments."
This is rubbish! Smalltalk may - for a number of reasons - never have achieved its true potential, it is re-gaining popularity in the web development world (see www.seaside.st, www.world.st)
"Francis said: “I have seen examples of developers on older technologies like RPG and Delphi charging twice the rate of a developer on a newer technology.“
Having started my career as a PowerBuilder developer I perfectly understand why RPG or Delphi experts NEED to charge twice the rate of newer technologies. There are no or few new projects being started using these older technologies (understandably), so they are only required to make changes to existing systems, now these jobs are few and far between compared to the plethora of new projects in the newer technologies, so they need to cover themselves for the time spend between contracts to feed their families!