I took a $14400 salary cut 12 months ago in order to keep my job. Last week, I was asked to take a further cut of $19200. My Job description has also changed increasing my workload by 85%. My Work Life/Home Life Balance has been destroyed. My boss has stated the amendment to the employment contract is non-negotiable and if I don't agree I will be made redundant. My coworkers have received 1 pay cut of 10-15% which is temporary whereas mine is permanent. Can they force me to agree to this unfair and frankly bullsh*t proposal?