As trite as it sounds, "Success = Hard Work + Opportunity" is still the default equation that makes the most sense to me.
And while people from all strata of life work very hard, opportunities are obviously and incredibly unequally distributed (and perhaps becoming more so?).
If you were born middle-class in US/Canada 20 - 40 years ago, your access to opportunities to improve your station were/are immense. Layer on your ethnicity, if your parents were in a stable relationship, if you grew up in relative safety, if you had a decent education... hard not to think that your opportunities were 10x or 100x someone who had none of those things.
But you also need to define "success". To this crowd, is "success" merely "leading a better life"? I'd argue most of us already have this as our default reality. I.e. the gradual reward for working hard via promotions and relative safety of career.
I remember after my startup was acquired, a few people would say to me (well-meaning obviously) "wow it's great your hard work paid off!". And I just said something like "thanks, ya, lots of people work a lot harder than me but didn't get the same outcome - so there was a lot of luck involved too!" etc. Even thinking of my own immigrant grandparents - what THEY did was HARD.
I think about those exchanges often. Tech -- at this particular moment in history -- disproportionately rewards "hard work" (which many of us find fun anyways). Or perhaps better to say that Tech provides access to the right kind of opportunities that allow for a DEFAULT "life gets better", with the possibilities of "life suddenly gets 100x better".