What is merit?
In religious circles, the higher up the person moves in the organisation, the more... prestige they accrue. They become more important. They have merit, more merit than others. And the people who are part of their religion are fine with that, and the lower downs in that become the ministers and other positions. But that government is a theocracy, and most people do not want to live in a theocracy.
Military men accrue merit. But no one wants a military government. Even the best are too strict for the average person.
Academics, across all disciplines, would have a better grasp of society than the above examples. But a lot of academics have gone from school, to college as students, then stay on as lecturers (personal experience), and never get any actual life experience. The ivory tower thing is real (of course not in all cases, but significantly). So life, as she is lived, can sometimes escape their purview.
What is merit?
There's a guy I know, great muso, his stuff's online, but his day job is a bricklayer. He's been doing it for decades, and he's good at it. Won awards. Another one I know became a tech college teacher because he was very good too. These are men of their hands. They have no qualifications. Maybe a license, but so do others who are, let's say, not as good. They pass a basic course. In a meritocracy, where do they fit in? Where is the acknowledgement of their merit?
And then, once you figure out how merit for each and every one of the whole cornucopia of professions, arts and skills is measured, and how many points to give each vote, by that time... we'll all have grown old. I mean, an artist. How do you measure art? Do you say art is not worth mentioning? Also, "who watches the watchers?" Who judges the judges?
So maybe, for now... maybe one person, one vote. That works. IF you have the gumption to get out there and vote. And think about the issues before. I cannot think of a more important thing a person can do than vote. And be responsible for their vote.
I like the idea of a meritocracy in theory, but there are many factors to weigh in, maybe too many.
One person, one vote. Do it properly, it works. When it isn't undermined by petty corruption, media manipulated by very vested interests, when the message is obscured in a thousand ways.
The lens, the view, has to be wider.