By ascribing success to meritocracy, you also by definition ascribe failure to lack of merit or application. This is platently false. The failure here is to not recognise that merit isn't the only reason for being employed, unempolyed and underemployed. [0]
[0] "A kinder, gentler philosophy of success": http://www.ted.com/talks/alain_de_botton_a_kinder_gentler_ph...
After a decade of working as a chef, he was looking forward to finding a job as a Web developer.
Calling him a web developer is a bit of a stretch. He initiated a career change in the middle of the recession (albeit caused by the recession as well).
It's incredibly strange that you view not twittering, spending time on stackoverflow, or blogging as not doing anything.
By that standard, absolutely all of the best people I've worked with in the past decade are useless, and some of the worst people I've worked with pass your test with flying colors.
I'm not generalizing to the idea that bloggers and stackoverflow users are all useless. I'm taking the far more sane position that blogging, twittering and stockoverflowing are uncorrelated to work ethic and talent.