had three calls today, looking for the wife? whould just hang up when they heard me

Received call from this number in Georgia today. Caller ID says " Seattle WA" -- they do not leave a message. Has called 2x today

Got a call from this number today, it was a female that said she was calling from some company (she it kind of fast) it was regarding my Visa/Master card account.  When I asked her to repeat from which company she was calling me from she just hung up, i tried calling the number back and the operator came on saying it was a disconnected number and no other information was available.  

I just wonder how these people who are scamming other people can do this kind of stuff, knowing how to bypass and have a nonworking number appear on your cell phone.  If these people are so smart to do this why don't they find a real job or go to school or start a real business, use that brain for good and not bad.