The workers demanded that management raise their salaries.

Literal

Workers [topic-は] management [to-に] salary [possessive-の] raise [object-を] demanded.

経営者 ('manager, management') vs. 労働者 ('worker') — the standard opposition in labor vocabulary. 給料の引き上げ ('salary raise') uses the formal 引き上げ instead of 賃上げ.