I believe you are referring to his blog entry rather than his longer piece in the
Journal of Economic Perspectives (JEP). His blog entry discusses other economists' research that examines the "economic health" of the middle class. See his
JEP article for his broader perspective.
In my opinion, the major point of his blog entry is relevant to the discussion of "income inequality." "(H)as the middle class experienced stagnant real income (a mere 3.2 percent increase) or significant gains (a 36.7 percent increase)? It depends on which measure of income you look at."
Employee compensation includes wages/salaries and employer-paid benefits (leave, retirement, insurance, FICA, etc.) According to
http://www.bls.gov/news.release/pdf/ecec.pdf, those benefits amounted to 29.7% of private sector employee compensation in September 2013.
Holding compensation constant, their wages/salaries will not decrease to the extent that they would have had not their employers eaten a portion of the premium increases. I expect that employers will respond to higher premiums in a variety of ways, some taking more time than others; e.g., some will some will hold compensation constant and lower other benefits and/or the wage/salary component, some will be able to raise the prices of their prices of their products and services, some will not be able to hire additional employees, and there will be a continued substitution of labor for capital as the cost of labor rises relative to the cost of capital.
A pedantic point --
wealth is a stock, income is a flow.
A relative price increase for any product or service (hamburger, milk, health insurance, etc.) that we consume has a real income effect. To the extent that we can substitute other products/services (e.g., chicken, pork, fish, tofu, etc., for hamburger), we are able to mitigate that effect. The possibilities for mitigating a higher price for health insurance are limited, to say the least.
Most of the discussion about "inequality" is in reference to income, not wealth.
We can use a portion of our incomes for consumption this year and defer consumption to future years by investing the remaining portion. Some folks have very high incomes over their working lives but have little to show for it at the end. Spending their incomes on "wine, women, and song" may give them good memories, but little else. (Well, maybe cirrhosis of the liver and a social disease

) . Some folks with modest incomes defer consumption and obtain substantial wealth by investing wisely.
I agree completely, and in a competitive market, employees will end up where they add the most value and therefore maximize their own incomes.
Dave, I discuss international trade and globalization with trepidation. You are always civil, some TBN members are not.
With international trade and globalization, there are winners and losers in each country according to each country's comparative advantage. Comparative advantage can and does change over time. The US is at a comparative disadvantage when it comes to some portions of the textile industry. The US losers are the affected textile companies and their employees, the winners are consumers -- we can buy t-shirts for $5 at Wal-Mart. To the extent that the employees have skills that are transferable, they can seek employment in other industries. They suffer if their skills are not transferable -- they will have to accept lower wages/salaries or retrain. I don't know the extent to which textile CEO's have skills that are specific to that industry.
For the products and services that the US has a comparative advantage, the winners are the companies and their employees who produce the products and services. The losers are the US consumers of those products and services. In 2011, the two leading US export sectors were industrial supplies and capital goods. (
What America Sells To The World : Planet Money : NPR) These sectors are capital-intensive and require a highly-skilled workforce. That workforce is paid accordingly. .
It comes down both to the supply and demand for skills. I may be the most-skilled textile loom operator in the US, but if there is no demand for loom operators, I cannot expect to be rewarded for that skill unless it is transferable to other occupations/industries. I may be the best textile manager in the US, but if there is no demand for textile managers, I cannot expect to be rewarded for that skill unless it is transferable to other industries. (I need to do some reading on the transfer of executive skills across firms and industries. I do recall "outsiders" being brought in as CEOs: as I recall, some have succeeded, others have failed.)
I agree that attempts to oust corporate boards are rarely successful. However, boards have fired incompetent/under-performing executives and boards have been ousted. Under- performing companies have been taken over by other companies (public and private) in either friendly or hostile fashion.
I disagree with your take on institutional investors, pension funds, etc. Those folks are in the business of picking stocks, bonds, etc. for the benefit of their clients. Occasionally, they do participate in attempts to oust boards, but I think they avoid under-performing companies by steering clear of their stock.
Steve
I didn't take as much time as I should have in proofing my post. Please excuse my errors.