Seems like a good time to mention my old stand-by: There is no such thing as a labor shortage. There may very well be a shortage of qualified people willing to work under the conditions and for the compensation a company would like to provide. When stated that way you can see that there are several levers to pull, the most obvious being compensation.
your old stand-by doesn't make any sense "there is no such thing as a labour shortage" is totally represented by a shortage of qualified people for the given compensation. This is the basis of every economics supply & demand graph, where explicitly refer to the misalignment as a surplus or shortage.
It can however occur that a company requires skill x, cannot find a person for this position, and HR still refuses to increase salary for this position.
There is a mismatch in supply & demand of compensation. Not position.