Lack of marketable skills. Low skills=low wages=lack of job prospects.
Not really. The economy is massive and there are numerous opportunities and prospects. I picked fast food because the wages are uniformly low and it doesn't look fun, the two components most people care about with a job. There are equal or better paying jobs, that require little skill, yet aren't as irritating to do. In short, there are options.
Many of these options are gone in SR, just like a Third World country. Being a wageslave is actually a good deal, or so it appears to the slaves, but it also consumes your life. It's like being an Outer Party Member in the novel 1984.