If you've ever tried to employ someone on a UK visa you'll know why business, charities and academia are distraught about this. Even if you have no qualified UK applicants whatsoever you have to spend a lot of time and money fighting with UKBA papermill who reject applications on the slightest error. It would be fine if decisions were timely (like within a few weeks rather than years) or defective applications could be amended but the problem is the system is broken and deliberately so. Politicians have no incentive to fix it because that would increase immigration numbers for a year or two and thus they make it the next guys problem and broken it stays.