Obviously increasing income is important. But I think you really create wealth is when you start accumulating true means that allow you to store value.

Someone with good income, who does not save and does not invest sooner or later fails your system.

Someone with moderate admission, who allocates part of what he earns to safe savings, and a real asset.

In the medium length it will be creating more wealth than the person with good income but does not understand the money that is earned and that does not park anything wisely.