US Wage Gap Reaches Historic Levels as High-Pay Salaries Surge

The assessment is primarily based on a single, highly authoritative and relevant source: an academic paper from the MIT economics department. This source is described as directly analyzing and depicting major wage inequality trends in the US. Such a source is the gold standard for evidence on this economic topic. A secondary source, a social media post from a news station, corroborates this by mentioning findings on "rising economic inequality in the U.S." and a key metric, the 90/10 ratio. Another source provides a helpful definition of this ratio, confirming it is a standard measure for the gap between high and low earners. The remaining sources are user-generated content with no authority or are completely irrelevant, and thus they are disregarded. The conclusion heavily rests on the high-quality evidence from the academic paper, which, based on its summary, directly supports the statement that the wage gap is at or near a historic peak. The high confidence level is derived from the exceptional authority and relevance of this key source.