When employment starts, so does the employer-employee relationship. This type of relationship is defined by the kind of contract the employee has in the company. It revolves around the things they talk about and disclose to each other before the start of the employment. And before such employment, it is necessary that the company has certain basic information about the employee. This is basically for accountability purposes and for the sake of having a complete and uniform record of all employees.
On the other hand, a detriment of using a pre-written template is that it may not handle more complex jobs or specific types of contract projects where there are a lot of detailed deliverables. Obviously, a basic form contract is unlikely to cover all the bases for things like international joint ventures, multi-level sales agency relationships, or insurance services. These are agreements where the costs of an attorney are justified.