I've observed the recent 'actual' system of visa sponsorship in Qatar and somehow I still find it better with respects to leverage of population influx. It also helps to the lesser-fortunate hired workers from different countries (I'm supposed to say 'professionally-hired workers' but it now sounds like a different story) who cannot compensate for their own paperwork and medical checkups.

It's just that the right to hold your own passport after stamping it with the resident visa becomes a different issue. You can't blame the sponsorship system for having to hold one's passport as there were really really plenty of people who would just 'grab another opportunity' without even a notified approval by his own previous company, kinda like an AWOL. It may probably be the only way to 'control' greed among employees with respect to his own professional and responsible conduct.

Now choosing the right person for the job position is a different story, hence my previous comment above.

"Everything in this book may be wrong." Illusions: The Adventures of The Reluctant Messiah by Richard Bach