It is a good point. In an amazing book I read from a Christian businessman, he actually breaks it down into 3 phases. The first phase is what you outline, earn more than you spend.
Yet he points out in his book earning more than you spend doesn't ultimately achieve the goal of many Christians. Many Christians want to give away 90% of their income and live on 10%, while being wealthy as they do this.
Generating large amounts of wealth can usually only happen by two activities: Owning Value Appreciating Assets or Owning Income Generating Assets
Value appreciating assets can be things like good real estate that also produces income. It can be cryptocurrency or good stocks.
Income generating assets are businesses.
People with tremendous wealth and wealth generation, are utilizing one of these two avenues to wealth creation beyond what a job would pay. Great advice @sirknight , thanks for sharing.