That can't mean "unfilled jobs at market wage", because jobs at market wage get filled (that's what market wage means). So you're talking about unfilled jobs at below market wage. Of course there'd be tons of those posted. Not sure that comparing it to the number of unemployed people means anything.
All that happens then is that a suitable applicant quits their lesser paid job and takes mine, but at a market level that just shuffles the problem around. There's still an unfilled vacancy. It doesn't matter how much money you offer, the invisible hand of the market can't magically conjure up qualified experienced applicants out of thin air.
This is the problem with this kind of blinkered market forces fundamentalism. The market isn't instantaneous, there isn't an endless supply of every product or service depending only on price, to fill every need. The real world is lumpy, and slow, inelastic and constrained.
The problem in developed countries is quite different, there's plenty of capital (in comparison) and many of the people with the ability to make effective use of it are already doing so. The unemployed remnant is in a very different pickle. For example in the US there are far more unfilled jobs than there are unemployed people, it's that they are largely in different places and require skills and experience the unemployed don't have. That's a completely different problem to the one in Kenya, say.