Another benefit is the clear reduction in legal liability that a business can achieve by using a simple employment agreement template. When you have clear requirements for both parties written in a signed document this eliminates a lot of the ambiguity and costs associated with lawyers and courts if you are ever sued by a current or former employee (or worse yet, the employees union). As long as the agreement follows the law and the employee was competent at the time of signing, most courts will honor its terms. This can get you out of a very expensive situation!
Another downside to using an employment agreement template is the potential for building inflexibility into your business. In particular, employment law changes may invalidate or make an existing agreement out of date. If you use the same job template for hundreds of employees and the law changes, you may need to go back and have them re-sign new contracts. This would not always benefit the company, though it is a small risk to take to get the significant legal protections afforded by even the simplest of contracts.