Woman, if you don't buy social security, where is better to go to work?

At present, there are still many jobs that are not paid social security.

For example, take-away delivery, express delivery, working as a security guard in some unknown residential properties, working in some small restaurants, and starting your own business, but now you are under less pressure and don't have to pay social security, but when you are old and can't work, you can only regret it when you see that your peers can get a pension every month.