&gt; Multiply by one hundred the number of doctors or programmers and you will see &quot;how valuable&quot; their job is.<p>The reason there is a scarcity is <i>precisely</i> the fact that multiplying availability is not easy, i.e. training is long and&#x2F;or hard and&#x2F;or expensive.<p>If you find yourself in a lucrative, scarce job, just make sure it&#x27;s hard enough that it will always be that way...