Paying more just means you fill your vacancy at the expense of another firm who has their employee poached. The net effect is that one company is still vulnerable.
Edit: The cheapskate can follow suit and maybe that convinces one person to undertake the 8-week cert. No more shortage. Or maybe they don't pay more and are DDoS'd out of business. Again, no more shortage.
Also, employees are not some company's property. At-will employment goes two ways, and if you want to treat them as if they were property you may as well just turn off the lights now because it will not end well.
What's the base requirement for these people?