Based on movies and books I've read, I noticed that the culture in South America is big on familial love. Their family spreads not only immediately, but even to cousins after cousins. You can see them living in family compounds and they greet each other as families.
Therefore, this could be a reason for the company's choice of a mechanistic structure. This structure is about the working together of single parts to create an efficient mechanism. Thus. familial relationship is very important. They have to invest in close family ties through social events.