The phrase "earnings level" refers to the amount of money a person or a company makes in a specific period of time, typically related to their income or profits. Full definition
Plus in some cases when they reach the high earnings levels a lot of players seem to have an «I've made it» attitude and reduce their overall levels of performance. (arsenalarsenal.net)
In Section 2, it was noted that the earnings replacement capacity of the Canadian RIS is quite complete based on the first two pillars alone at earnings levels up to one - half of average wages and salaries, but declines thereafter. (fin.gov.on.ca)