In Australia, there are protections in place for people who suffer injuries or illnesses that render them permanently unable to work in their previous career. This is called total and permanent disability insurance (or TPD insurance) and it will provide a lump-sum payment that will help you maintain your finances to a certain extent, even as you can no longer earn an income in the traditional way.
It is important to note that you do not have to have suffered this injury or illness as a result of your job to make a TPD claim.