Why does the company issue a document allowing employees to voluntarily reduce their salaries?

In the internet industry, the most basic work is not difficult for their professionals. Interns who just graduated every year can do it, which is cheap and easy to use. Those old people have to consider raising their wages, which is not cost-effective. When the company issues such an announcement, there will always be people who agree to pay cuts. If they don't agree, they will definitely be oversubscribed, and the company will definitely give priority to those who automatically reduce their salaries. If they don't want to do it, they leave, and they recruit new people at lower prices.