robert blethen gets 300 dollars a day. but it's not just about the money. my brother asks me all the time, and you sick of driving? i say i don't know, i've done it all my life. how do i stop now? reporter: but not everyone's like him. siew cheng ghiz from los angeles was a flight attendant for 40 years. after retirement, she could no longer afford to fly. like many americans, she depends on a pension which is financed by shares in the stock market. now the market is low, her pension is worth less. >> portfolios have diminished considerably and that does concern retirees because that's the money we plan on living on. reporter: recently, the 67-year-old started working again in a boutique at an hourly wage much less than she's used to. she only needs to work part-time, that that could change. >> if a person had to depend on that part-time job to supplement their income because of the minimum wage, it would probably have to work quite a few days a week. at that point, it becomes a full-time job, not just part-time like a lot of retirees would like. reporter: s