With reference to a specific established organization as your case : analyse the notion that the 21st Century manager prioritise personal gain ahead of stakeholders interest

I answered a similar question but it is a general observation. No established organization was mentioned nor inferred.

With regards to managers prioritizing personal gain ahead of stakeholders interests, I am thinking about reaching or going beyond their quota or exceeding expectations.

If under the manager's supervision, the firm is being productive, its success will first be credited to the manager and it can either mean a bonus or promotion for said manager, thus the personal gain. However, it does not put stakeholders interest at risk because if the company is successful and profitable under the manager's supervision, the stakeholder will also benefit from said success through increased dividend or value of shares.