Inequality between investment banking firms?

Saw an interesting article in HBR called "Corporations in the Age of Inequality": https://hbr.org/cover-story/2017/03/corporations-….

Author contends that corporate strategy since the 1980s has driven income inequality between top firms and the rest of the industry, as market leaders like Google and McKinsey pay increasingly outsize salaries to recruit top talent relative to competitors and all firms increasingly outsource non-core operations.

Thought it would be interesting to discuss the extent of this phenomenon in front office investment banking, perhaps BB/EB vs. MM vs. Boutiques, in terms of quality of talent, salaries, perks, etc.

No idea what my boss makes but it's sure as hell a fraction of what an MD at a BB makes...