senior talent are the one's making the most money, and costing the corporations the most year over year, the fact they've left willingly frees the corporation up from offering severance and unemployment benefits
sure, and the worth of "better" is determined by a company at any given time. any market, including the job market, is what people are willing to pay, and willing to let go of.
Senior talent tends to be "T people", while juniors tend to be "I people". Removing that T scaffolding, is how corporations end up like Boeing or the Titan.