I strongly believe that hiring should be based on data. Based on the following 5 factors:

1.Intellect 2.Values 3.Motivations 4.Behaviours 5.Experience

With these factors you can determine a persons Cultural Fit and predicted future performance. In fact, you could automate this through technology.

For example, for predicting future performance we could test the high performers in our company then we have a template for what motivations and behaviours high performers are likely to exhibit. Based on this we can then assess new comers and map them against high performers. The more highly correlated they are, the more likely you should be to hire them.

For culture, if you currently like the culture of your company you could simply assess the values of all your employees, average them and assess new applicants against this and depending on correlation, hire them or not. This could be done through a CFT (Cultural Fit Tool)

But this is just one suggestion. Software that enables this could work quite well IMO.