It depends on your circumstances, if you really really need to change jobs, then yes i would say apply for lower salaries, however you may be asked why you have done so, and “because i hate my current job” really wouldnt be the appropriate answer – maybe something like, I feel i am not being challenged in my current role and need a change of direction, with this I fully expect a lower salary to start with because i may not be as experienced as someone else”