[Batman.]

As Jess said above, typically Disability (obviously depending on the nature, but in almost every case with mental health) will let you work a certain amount of hours.

Here, how it works is, you can work X hours a week (I think less than 40..? But for simplifying this, let's say 30). If you work any more than these "30" hours, you will get the difference that you made garnished off of however much you initially qualified for.

So for example, if I were on Disability and getting $400/month, but I picked up some extra shifts and got 32 hours the one week, they'd deduct however much I made in that 2 hours (say $20, for simplicity again) off of my cheque, giving me $380.

I'm not 100% sure on their hours or deductions (as I said, all the numbers I gave in the example were for simplicity in explaining), but it's something to look into.