The basic idea is that the concept of "you get what you pay for" only is true up to a certain point, when increase in price doesn't reflect increase in quality anymore. For example, you take a $500 instrument. When you compare it to a $1,500 you'll notice exactly what the $1,000 extra could get you. Now compare the $1,500 instrument to a $2,500 dollar instrument, which is the same amount of increase in price but not the same kind of increase in instrument quality.
If you agree with it or not is another matter.