This does not surprise me even a little bit.
Last night, after going to see a matinee of In Time with her best friend, Rachel spent quite a while regaling me with how bad this entire movie is (even apart from Amanda Seyfried's character spending a ridiculous amount of time running very quickly on 5" heels). At one point I said to her, "You know, this has to be based on something else. This is the kind of thing SF writers were exploring about 40 years ago."
Turns out to be 46 years. And turns out to have been Harlan Ellison.
Color me not-shocked. How did the writer/director think no one would notice? And since when have Hollywood types stopped buying up the rights to stories with even a little similarity to avoid such lawsuits? It seemed weird at times, but also prudent. Then again, no one with much brain seems to have gotten within a stone's throw of this project, so the lack of foresight about this is also not surprising.