There are systemic factors that may prevent the market from clearing. Conservatives would point to the minimum wage and business regulation. Liberals would look at aggregate demand. And both would consider the money supply. But markets never fail because there aren't enough people willing to try to make money by hiring others
At best, the people who claim to be job creators could be productivity enhancers. Companies succeed, at least in part, by improving the productivity of their employees. And, improving the productivity of employees makes their labor worth more which eventually results in rising wages. Judging by the trajectory of the wages of American workers over the past 20 years, it would appear unlikely that we are fostering many productivity enhancers these days either.