The document discusses factors that shape internal pay structures within organizations. It notes that internal alignment, or internal equity, refers to pay relationships among different jobs, skills, and competencies within a single organization. Key factors that shape internal structures include an organization's strategy, human capital needs, work design, and overall human resources policies. External factors like economic pressures, government regulations, external stakeholders, and cultural customs also influence internal pay differentiation. The goal is to have compensation structures that support organizational strategy, work flows, and motivate employee behaviors.