As others have pointed out, wages for these job openings that cannot get people to show up are frequently so low that its not worth showing up for them in the first place. Many of these No-Shows have to prove that they are "actively seeking a job" to continue getting whatever benefit they currently receive. And these people are doing the (short term) math, the wages from the job + a full work week < money they get for free from the government. Brutal problem, but paying wages that are market for the kind of employee you want _should_ change that