Men of property often look upon their wealth and say: By my wisdom have I gotten me this wealth. But who gave them power to get wealth? God has bestowed upon them the ability which they possess, but instead of giving Him the glory they take it to themselves. He will prove them and try them, and will bring their glorying to the dust; He will remove their strength and scatter their possessions. Instead of a blessing they will realize a curse. An act of wrong or oppression, a deviation from the right way, should no sooner be tolerated in a man who possesses property than in a man who has none. All the riches that the most wealthy ever possessed are not of sufficient value to cover the smallest sin before God; they will not be accepted as a ransom for transgression. Repentance, true humility, a broken heart, and a contrite spirit alone will be accepted of God. And no man can have true humility before God unless the same is exemplified before others. Nothing less than repentance, confession…
"But thou shalt remember the Lord thy God: for it is he that giveth thee power to get wealth, that he may establish his covenant which he sware unto thy fathers, as it is this day."
The EGW passage directly references the idea that God gives the power to get wealth, which is the central theme of Deuteronomy 8:18. It expands on the consequences of forgetting God in the acquisition of wealth.