Whether you are a contract employee or a direct employee, whether you are a permanent employee or a temporary employee, if you are receiving a salary above the minimum wage rate, you may not necessarily be entitled to a raise or DA (Dearness Allowance) revision. This is one perspective.
Cost of Living and DA Revision
Another perspective is that DA is increased based on the rise in the cost of living index. If my salary is fixed at a certain level and there is an increase in the cost of living index, I should receive that benefit. Employees can obtain this benefit through collective bargaining.