Wealth and income don't always correlate, particularly at the high end of the scale. Inherited wealth, business or real estate ownership impact wealth a great deal more than income. On the other hand, celebrities and athletes can have enormous income but fail to build wealth and, in fact, not infrequently go bankrupt altogether.
Keep in mind, however, the "lifestyle wealth" of spending rapidly which many people find more appealing and enriching in the long run than putting it in the bank. Would you rather live the life of a miser like Warren Buffet, living in the same tiny Omaha house 50 years while amassing a fortune (for charity, it seems), or die bankrupt like Sammy Davis Jr, singing, dancing, laughing and partying until 7 am most nights?