If a low wages created prosperity, as you imply, then countries which have the lowest wages would be the richest countries per capita, but we all know that not to be the case.
You said changes to wages can be harmful. Which is true. They CAN be...both up, OR down. Increasing wages to high, or decreasing them too low, is likely going to cause more harm than good, as Imagep so succinctly explained to you.
Now, being that you are not actually adding anything at all to this debate, I'm pretty much going to ignore you in this thread from here on in...at least, until you come back with a post with a little substance.
A single company to increase it's profits by not operating as efficiently as possible, thus there is no "naturally" occuring mechanism to keep a downward spiral due to the lack of need for human labor from happening. The only way to stop it is by changing the rules of the game, and that can only be done by government.