There are some employees who make it past the first two weeks, then have a difficult time being good enough. The very first thought I have is that the end of the day, or the end of the week, most people want to go home feeling good about themselves. Very few people enjoy doing their job in a way which displeases co-workers or supervisors. So if an employee does the job incorrectly, it is probably due to lack of training, lack of communication, or even having too many bosses - also known as role corruption. They actually want to be competent.