I say this everytime it comes up:
For someone on disability benefits, they can lose all their benefits by earning a very very small amount of money on a single paycheck.
The exception to minimum wage is so the ones who want to work, can work without losing benefits.
So before we raise their wage, we have to fix how/when the benefits are effected by income.
Personally the fairest way is after something like an extra couple hundred a month, every dollar earned just reduces benefits by a dollar. And if all the benefits are cancelled out, keep them in the system instead of yanking it on the first paycheck. Give them 6-12 months to show they can sustain, and keep a safety net for when things change