Which is why I said "in traditional markets."But (from the page you linked to):
Because it's also more complicated than it appears at first glance, the relationship between inflation and unemployment has broken down in periods like the stagflationary 1970s and the booming 1990s.
Inflation isn't a problem of too much employment. It's fundamentally a problem of too many people trying to buy too much stuff (or another way to look at it, not enough stuff to meet demand). So anything that gets people to not spend money on stuff and do other things with it instead will tame inflation. For markets where you can increase the supply of stuff for people to buy, anything that does that will help too.
Inflation is a side effect of excess monetary supply. It's not just a matter of "if we print money, we get inflation," because the US printed $2T after the 2008 crash and there was no real measurable effect on inflation. There are a lot of moving parts. Employment is definitely one of them - competitive employment creates higher pay which creates more buying power which creates higher prices.. etc. Nothing can be distilled to just one factor, but to say that employment and inflation have a direct correlation in traditional markets is true.