@corollax
To be honest: I don't get the relationship between the wikipedia article and this problem.
If I play lets say 2000p of an army and spend roughly 300p in Troops instead of 100p to win big in my world this is a marginal difference in killing power. (1700p instead of 1900p)
@peregrine
Because the metagame changes. You've made certain decisions in building your list to ensure that you can win overwhelmingly (for example, taking enough scoring units to claim and hold all five objectives plus the table quarters victor condition), but so has everyone else in the tournament. If you remove the margin of victory factor then now people are willing to change lists and you don't necessarily have an ideal list anymore. You might find that you have too many points invested in blobs of scoring infantry and don't have enough offensive threats to push out of your own deployment zone successfully, while people who don't take an excessive amount of points in scoring units don't have the same problem.
Again, we are talking about a difference of about 200p here. You certainly don't need to capture 6 objectives. Chances that you actually pull it off are marginal and the risk of losing too much killing power is too high. There are lists, that could do it without suffering at all (Necrons, Coteaz,
DE, Nids) as their Troop choices contribute to the fight.
But if your troops are neither dirt cheap nor somehow useful apart from scoring, it would be foolish to spend more points on them than absolutely necessary even in a meta where you have to win big. (Because you won't win against the lists with more efficient troops).
What the meta does is not that all guys spam troops, thats rubbish
imho. It limits the number of viable lists to very few (Lists that have enough troops AND enough killing power). Those lists do perform as well under W/D/L-conditions. But a greater variety of lists is possible when a close win is enough. Thats certain.
But still 1 Troop is just a risk too high and you don't gain that much. (or do you think that spending 130p for a minimum Platoon instead of Harker would have changed your output to an abysmal level? I wouldnÄt think so.

)