There are two mechanisms by which we get richer. One is by increasing our income. The other is by reducing the prices of the things we buy with it. The former is how we increase our wealth relative to other members of society. The latter is how the society increases its overall standard of wealth.
On one hand each of us wants to get paid well. On the other, the more we get paid the higher the costs of the business we're in and the less of its fruits the society gets to enjoy overall.
This dilemma is particularly acute if you're lucky to be in a business you genuinely care about (a huge and rare privilege). For example, if you work in space industry, your salary and benefits contribute directly to the costs of space exploration. This means that ultimately the more you earn the less space exploration we can do per buck.
Generally, people's pay is a balancing act that should involve both fairness and efficiency.