It is not about hard work, or "bootstrapping" yourself. Its all about the luck. And they have been lucky. They are reaping the benefits of their luck at a disproportionate rate then the these other people. And they aren't doing anything about it.
It is ridiculous that people who make $250K or more a year (and I don't care where you live) think that they are "middle class". Bullshit. You are wealthy. Most other people are not. The quicker you admit to it - the more the economic disparity becomes obvious and something has to be done about it.
In Inequality for All—a 2013 documentary with Robert Reich in which he argued that income inequality is the defining issue for the United States—Reich states that 95% of economic gains went to the top 1% net worth (HNWI) since 2009 when the recovery allegedly started. (https://en.wikipedia.org/wiki/Inequality_for_All)
By continuing to state that they are 'normal' or 'middle class' or 'frugal' - they are really trying to convince themselves that they are not the on the "taking" part of society.