The heirs who do not work but expropiate dividends of profits from those who do talking about inefficiency is a laugh.
Why should the worker's creating the wealth care what the idle class owners think?
We could discuss this within for example the restaurant industry, and that could be interesting but AMZ does not fit the 'no generational wealth, just some business owners' rhetoric.
For restaurants what we find is incredibly thin margins being covered up by exploitation of the lowest rung rather than adjusting of prices, efficiencies in supply chain, focused menus, etc.