Do migrant workers need to pay social security?

We have just sent a legal memorandum to a company to be listed, in which the opinion on whether migrant workers should pay social insurance is: In view of their doubts about the current social insurance policy, migrant workers are worried that there will be no actual income after paying insurance benefits, and a large part of their income will be occupied, which leads them to refuse to pay social insurance benefits. Migrant workers and former employees continue to pay social insurance for them, and they don't want enterprises to pay social insurance for them. Therefore, it should be made clear in the labor contract signed with them that social insurance premiums are included in the paid labor remuneration, and migrant workers and former employees continue to pay social insurance for them, but they must explain to the above employees whether they are required to choose social insurance by themselves or the enterprise will pay it on their behalf. If migrant workers and former employees continue to pay social insurance for them and do not want the company to pay social insurance for them, they must sign a personal statement to avoid legal risks to the maximum extent. At the same time, the actual controller of the company promises to bear the legal responsibility of being recovered independently.