英文解説
The second reason why a large company is better to work for than a small company is that a large company is more stable than a small company. To make it clear, I cite my experience.(this sentence is not particularly useful) Currently, I am working for a large company which is ranked No.3 number three (spell out numbers less than one hundred) in the market of trading business industry in Japan. My monthly salary is 20% higher than my friend, working for a small company. Additionally, my bonus is also 30% higher than my friend. Although a small company has an advantage such as close relationship between management and employees, a large company is stable. As the above examples illustrate, a large company is more stable than a small company.
解説

Your example (of your salary being higher than your friends) could be because of many reasons. Perhaps you have more experience than your friend, for instance. Moreover, you do not make a clear connection between stability, and salary, which makes this example confusing.