No one needed to. Like any self-organizing system, capitalism just happened. Chaos will prove to economists that erratic oscillations are normal and healthy for the economy. In the extreme, the suppression of market chaos creates a black market. Several analysts argue that America's illegal drug market is so enormous largely because the illegality drives prices far above production costs.
High prices create fantastic profit margins in the illicit distribution network.
Only when a price formula is written into law does a white market go gray. Many nonprice rules, such as safety regulations, actually improve market function. For most of the twentieth century, governments have set prices for all kinds of things. In the late 1970s, this trend was reversed. This did not come from an outcry for free markets.