Recall that for someone "making" $5M per year, the majority of income that high is inevitiably extractive and exploitative and comes from ownership and power, not the output of their actual work. One could argue if they deserve any of it beyond their actual real wages at a fairly evaluated rate, which might cap out at $1M in a democratic society. FDR proposed a 100% marginal tax rate on the highest earners, his opponents argued him down to something in the 90s, spawning the most productive period in US history.