I would say that in an ideal meritocracy, the people with the most knowledge, abilities and intelligence should be the ones making the decisions and carrying the responsibilities. The willingness to work hard, however, should determine income, luxury and comfort.
The problem, of course, is that the powerful usually try to make themselves and their friends wealthy, but maybe this separation of the idea of meritocracy into (knowledge/ability = power/decisions) and (hard work = wealth/comfort) is what we as a society should strife for.
Thoughts?