So, when you start receiving money from social security working is a zero sum game, the way it's currently set up at least in the US it is mathematically....I wanna say impossible from my current understanding to earn more than you'd lose in benefits by working.
The only social program that is completely independent of earned income limits is SSD, which makes up at most a third of your total benefits if you're qualified for everything available. HOWEVER, if you earn more then (right now it's about $800) for any nine months (not necessarily consecutive) during a rolling 60 month period your SSD benefit will end along with your Medicare. You'd no longer be considered disabled.
SSI, Medicaid, housing assistance, energy assistance are all needs based so any income or savings or asset value above $2000 (outside of an ABLE account for those disabled before 25) will disqualify you, as will owning more than one vehicle or a single vehicle worth more than $4500 FMP.
Passive income though, doesn't count against SSD, so stocks bonds and whatnot, the fairly well off are still able to collect their social security
As a side note, were someone unfortunate enough to become disabled before their student loans were paid off there is technically a "forgiveness" program, during which the forgiven amount is considered unearned income by the government and is absolutely taxable. This is not discussed at any point during the forgiveness process and the folks in the DDB (death disability bankruptcy) department don't know because it's not included in training.
Also this zero sum game also applies to getting married. Most receiving social security have far more to lose than gain from being married. And the language in their regulations do not require people be legally married for their significant others income to be counted as their own when applying for benefits, only that they "hold themselves out to the community" as a couple.
They use private investigators in these cases to sort out the relationship if they suspect one, but they only investigate suspected heterosexual couples.
Sorry, bit of a rant, but working above the table if you're getting benefits means you'll lose more than you'd make, and working under the table is risking up to $10k in fines and fraud charges.