The social security number will be part of the template. It will provide the company everything it has to know about the employee. If he has an outstanding warrant of arrest from the police, if he is an outstanding debt, what responsibility he has, what violations he did, etc.
You can create professional looking web form templates, just clicking a few times on word. Couldn't believe, right? YES, you can use Microsoft word to create professional form templates for your site. Definitely, it will be a plain one, with no visual interfaces, but this will work like a professional form, trust me!