The thing about this that's so distasteful is that it removes the basis of enfranchisement from being the inherent worth of a human life and moves it more to "what have you done for me lately". It's pretty gross.
The distasteful thing is people refusing to contribute to society, especially for long periods of time. I know many people who have various mental and physical disabilities (some severe) who insist on working. Some able-bodied people can't even match some with severe disabilities. It's sick.
Any collectivist commune would kick you out for this.
It's also interesting you use the McJob angle, because when you consider the price of a Big Mac, labor is by far the largest contributor of cost, not profit.
A Big Mac's cost is 30% labor, 25% ingredients and only 5% net profit. The remainder is operating costs. Seems like a pretty good deal for the people making the Big Mac, they're getting 6x more than the franchisee gets.