There's a lot of rhetorical and policy overlap between Wall Street and Silicon Valley Democrats on the one hand and progressive activist types on the other: diversity, feminism, environmentalism, LGBTQ.
People who run Apple and people who complain bitterly about the labor practices of Apple's foreign contractors or the bonuses that corporations pay their CEOs can sound eerily alike on most political issues.
The Silicon Valley/Wall Street Democrats will eventually succeed in completely marginalizing the few remaining prominent old school pro-working class Democrats. The way in which the Democrats will accomplish this is by portraying the American working and middle class as intrinsically reactionary and unfit for a political voice - they're too patriotic, too socially conservative on LGBT/feminist issues, too "racist" or "nativist", too opposed to "green" policies (i.e. "how dare these selfish jerks complain about rising gas and food prices when they should care about Mother Earth") etc. This means that eventually, any policies that benefit the working and middle classes, at least those who can't claim racial minority or some other collective victim status, will be seen as reactionary as well.
Fundamentally, this realignment of the elites with the Democrats is what the 2106 election was all about - the elites and their pet "minority" clients voted for Hillary, the working and middle class, including many people who previously voted for Democrats, supported Trump. Where else would they go when the implicit (and sometimes explicit) message to those voters from Democrats is "there's no place for you at our table."