If your specialist is generating $X additional revenue per year then the company will be paying him more like $X/3. Many specialists will realise that working

If your specialist is generating $X additional revenue per year then the company will be paying him more like $X/3. Many specialists will realise that working for one's self or in partnership with a small group of other specialists is far more lucrative. So there's no contradiction here. The employers are right to say that if they could employ more specialists on the cheap then they would win more business and make more money. And the specialists are right to say that they make more money with a different working arrangement. None of this implies that there is actually a real shortage.