There are many different skills training programs available depending upon which country you might be from and these are designed to help improve your chances of securing a good job. If you are unemployed or if you know someone who is desperately looking for a job then instead of referring them to jobs that they might be under qualified for, it would be a good idea if you could refer them to the skills training programs that would not only improve their chances of getting a job but their chances of sticking would also be increased.
One of the problems with employees from around the world is that they are often not satisfied with their jobs which they will be quitting sooner or later. It is really not a good idea to keep trying out different jobs and then quitting as your life is going to be affected given that you are going to have several commitments that would have to be met on a daily basis.
The best option for Spanish residents would therefore be to look for information on skills training programs such INEM as seen on cursosinem that would allow them to improve their skill levels which would in turn help them secure better jobs that would work in their best interest.