The lower-classes care about it now, and the middle classes are beginning to care more about it; and many of them don't care about the type of evidence you have

The lower-classes care about it now, and the middle classes are beginning to care more about it; and many of them don't care about the type of evidence you have mentioned. This is why left-wing politics is seeing a resurgence with Corbyn in the United Kingdom and Sanders in the United States. The happiest countries in the world are those where income equality between the residents of the country is more evenly distributed, people want fairness. The greater concentration of wealth to fewer people and businesses will likely in the near future cause further social upheaval amongst the masses, i.e. those that consider the current system unfair.