When the need for a military is recognized, and that need can be perpetual, it is up to the public to decide whether or not to affirm their representative's decisions by enlisting. Enticing people into the Air Force and Navy establishes a permanent military sector that competes with other public and private institutions in the job market. This could not be further from what the Constitution calls for. Another aspect to consider is that the signing bonus will only continue to fill the armed services with more poor and minority members, while failing to attract middle-class whites and women to the military. The less politically powerful the soldiers, the more likely they will be casually dispatched to combat.
Many people perceive the military to be a place for lower class and uneducated people to get a job.
We need more diversity in the services, not less.