There are many reasons they use contractors. Here are some of the reasons:<p>1) The agency in question has a hard cap on the number of employees, but has more work than it can accomplish with just this allowed staff. Contractors are the only option.<p>2) The government is building something and doesn&#x27;t need (or thinks it doesn&#x27;t need) to keep the experts around afterwords. For instance, you&#x27;re building a bridge and won&#x27;t need all of the construction workers when it&#x27;s finished.<p>3) To get around the broken hiring process<p>4) To get around the broken union rules<p>5) To theoretically save money vs. doing it in house