Baseball,
I agree they should continue to improve the hiring process. But it may be a function of simply being too manpower intensive to do it, and methods like the one you propose might require too many man-hours of line Captains.
My friend is a new hire and quoted 1000 pilots a year from 2017-2019. That is a manpower intensive hiring process.
I'd like to know how many are interviewed each year so I could figure the success rate. Even with a 75% hire rate, that's 1400 interviews to accomplish each year to get ~1000 pilots.