Alma 45:24

but they grew proud, being lifted up in their hearts, because of their exceeding great riches; therefore they grew rich in their own eyes, and would not give heed to their words, to walk uprightly before God.

They became proud and thought they were better because they had so many riches. So they became rich in their own eyes and would not listen to the words of Helaman and his brothers. They would not walk the right way before God.

They became arrogant, puffed up with pride because of their great wealth. They saw themselves as rich and important, and refused to listen or walk humbly before God.