Questioning Temporary Employment Services

I thought I would write out my frustrations with Temporary Employment Services. I don't know if anyone in their Home State has ran into this problem, but it's bad in the State where I live. I have signed up for work in several Temporary Services and have called in every week for 3 months to be put on the list for availability, but I have no work as of yet. I'm always told nothing is available or their slow at the moment, they will call when something is available, they never do. I have a lot of experience in factory work, I have a good work record, valid drivers licence, and a good running vehicle. Well now to why I feel they have no ethics or values I have been a residence of my state for 22 years, but you take a person with a criminal record, just moved here from another State, no Drivers Licence, or no Vehicle, etc. and these Temporary services place them in a job the very next day. I know they do this for a fact, at my last job I was always being asked to give a ride to someone with no car or licence. I also know they place them with a criminal record and just moved from another state for I have a family member that was just given a job and I know of a few other people. Well I just thought I would vent for I'm desperate for work and wanted to know if other people have ran into the same situation.