Comment by gruez

>Salaries aren't determined by labor value,

In a free market, very little is determined by its "value". Clean drinking water costs pennies, but its value is far higher. People in developing countries routinely spend hours a day getting clean water, which works out to a price far higher than even bottled water from for-profit companies.

>they're determined by how well employers can collude in a region to get the lowest possible rate while still being able to hire people. Thus they somewhat tend to correlate with cost of living, but not really, e.g. see London vs SF vs NYC.

Is there any evidence there's more collusion happening in London?

>employers will pay as little as they can get away with.

You're making it sound like this is some sort of profound insight, or that companies are being extra dishonorable by doing this, but literally everyone in an economy is trying to pay "pay as little as they can get away with". When was the last time you tipped a gas station?