In the world of sport a bigger slice of earnings goes to those at the top than what it used to. For evidence please look at English Premiership earnings in comparison with with lower divisions in the national game.
The same is true in the worlds of music, payment for movie actors and literature and the trend in recent decades has for income distribution to become more skewed in favour of a small minority at the top of their profession etc.
In the world of business there are independent firms of pay consultants who will do presentations to the remuneration committees of top 100 companies (and more if invited) on how the company must offer a remuneration in the top quartile if it wishes to outperform the rest. Not to sign up for these schemes is seen as professional suicide and so all climb on the bandwagon and next years top quartile earnings are pushed up. There is little academic support that a new CEO can changes the fortunes of a top 100 company in a short period of time but the remuneration committees are embarrassed into following the new scales and many cash bonus schemes are based on short term changes in fortune.
In good times most of the rest of us could not care less but when we start to feel poorer we get angry. Street protests this weekend capture a slow burning anger that I feel will burn brighter in the next year.
The linked article has a USA bias but I dont think the statistics would be any different here in Europe. The simplicity of the charts are convincing in showing that growing inequality is helping to make people angry.