I agree organization does influence company culture to an extent. However, I do think work culture is a big part of retaining employees. You want your company to do well overall and employee satisfaction can be essential to their individual output. I have definitely seen both sides of the spectrum, I worked for a company that had a very welcoming culture and one that was not as welcoming and very isolated. I preferred the company with the welcoming culture. I definitely felt like I was involved and it really came down to a great balance of work and play. The work was challenging but the community that you were a part of just made you feel like you wanted to be there. Whereas at the other company I felt it was very competitive and it made it hard to form relationships because you constantly had to fend for yourself and out preform your coworkers. Both companies I worked for had a matrix organization but the main difference between the two came down to how the managers implemented team building.