A few questions and thoughts arise in the mind when reading this thread. A few may already have been raised, directly or indirectly, but I'll list what comes to mind.
What is the criteria for an "advanced Buddhist?" Meditative attainments? Meditation experience? Theoretical knowledge?
What makes one believe these lead one to worldly success?
Is spiritual maturity in terms of contentment, humility, gratitude, peacefulness, etc. not considered "success" in OP's mind?
What makes one think an "advanced Buddhist" wants to be more successful?
What makes one think Buddhists are inherently more mindful or better workers than non-Buddhists?
The spiritual path may not be linear for some. Many worldly desires and goals fall away. The thinking, planning mind may become less filled with thoughts of any type of success. Meditation practitioners might actually become less skillful in their work life at certain times. They might work less than more. They might become lazier when performing work-related tasks. They might actually take steps to be less "successful" in the worldly sense so they can focus on solitude and simplicity. Just something to consider.
Do Good, Avoid Evil, Purify the Mind.