While I (vaguely) understand the notion that you are asserting, if the value of people can fluctuate (that is, human life has no intrinsic value), then what is the value standard in such a marketplace? Gold? dollars?
Whatever is traded in the market. I've found that even when there isn't a formal currency of trade (or the currency of trade is woefully inadequate for some reason such as a high rate of inflation or inability to use it for most trade in the market), markets tend to gravitate to a informal standard of trade.
And since human life is rarely traded directly, it is a tenuous connection in the marketplace, say to jobs that risk life and limb or in trade offs (such as where to live or what quality of tool to buy) which impose differing degrees of risk to a person's life.
This also leads to a rather dismal world in which some murders are ok, and some are slightly more ok than others. Of the choices of available dystopias, this one sounds less appealing than average.
It also happens to be the real world. Human life during a famine in Ethiopia is not as valuable as life in normal India (for example, the Thuggee cult, basically a small sect of serial killers, is supposed to have operated with near impunity for many centuries) which is not as valuable as a life in modern Sweden. This is also reflected in how crime is punished or not in these situations.
Ultimately, the poorer and more desperate a part of society is, the cheaper life becomes.