The statement that an effective 'Performance Management System' (PMS) needs to precede 'taking deadwood out' from bureaucracy is profoundly accurate and reflects a modern, humane, and strategic approach to public administration. Removing 'deadwood' – referring to inefficient, unproductive, or unmotivated employees – without a robust PMS can be arbitrary, demoralizing, and counterproductive.

Understanding 'Deadwood' and the Need for Removal: 'Deadwood' in bureaucracy can hinder organizational effectiveness, waste public resources, and create a culture of mediocrity. The goal of removing such elements is to enhance efficiency, productivity, and accountability within the public service. However, the process of identifying and removing them must be fair, transparent, and objective.

Role of an Effective Performance Management System: An effective PMS is a systematic process that involves:

1. Goal Setting: Clearly defining individual and team objectives aligned with organizational goals.
2. Performance Monitoring: Regularly tracking progress and providing ongoing feedback.
3. Performance Appraisal: Periodically evaluating performance against set standards and competencies.
4. Development and Training: Identifying skill gaps and providing opportunities for improvement.
5. Rewards and Sanctions: Linking performance to career progression, incentives, and, where necessary, disciplinary actions.

Why PMS Must Precede 'Taking Deadwood Out':

1. Objective Identification of Underperformance: A well-implemented PMS provides objective data and evidence of an employee's performance over time. It helps distinguish between genuine underperformers and those who might be perceived as such due to biases or lack of opportunities. Without PMS, 'deadwood' identification can be subjective, based on anecdotal evidence or personal prejudices.
2. Opportunity for Improvement: PMS is primarily a developmental tool. It identifies areas where an employee needs to improve and provides the necessary training, mentoring, or resources. An employee might be 'underperforming' not due to a lack of will, but due to a lack of skills, resources, or clarity in roles. PMS offers a chance to rectify these issues before considering removal.
3. Fairness and Due Process: Removing an employee without a documented history of underperformance, feedback, and opportunities for improvement can lead to legal challenges, grievances, and a perception of unfairness. PMS ensures that any decision to remove an employee is based on a transparent, documented process, upholding principles of natural justice.
4. Building a Culture of Accountability: When employees know their performance is regularly monitored, evaluated, and linked to consequences (positive or negative), it fosters a culture of accountability and meritocracy. Arbitrary removals, conversely, can breed fear and resentment, leading to a demotivated workforce.
5. Distinguishing Between Inability and Unwillingness: PMS helps differentiate between employees who are genuinely unable to meet performance standards despite support, and those who are unwilling. This distinction is crucial for appropriate action.
6. Preventing Arbitrary Purges: Without a robust PMS, 'taking deadwood out' can devolve into arbitrary purges, often targeting individuals based on political motives, personal vendettas, or superficial observations, rather than genuine performance issues. This can destabilize the bureaucracy and erode morale.

In conclusion, while the removal of non-performing elements is essential for a dynamic and efficient bureaucracy, it must be the outcome of a well-structured and fairly executed Performance Management System, not a standalone, ad-hoc exercise. PMS provides the necessary framework for objective assessment, employee development, and a just process, ensuring that any decision to remove 'deadwood' is legitimate, defensible, and ultimately contributes to a healthier, more productive public service.