The threats are that we (the UK that is) lose the skilled workforce, and this leads to a lack of innovative people who could generate wealth. I've seen the UK market become polarized, with highly skilled people in huge demand, but with lesser skilled people not able to find work. The experience / work catch.
It seems quite telling that to get started in IT you need at least 2 years up to date experience, a good (1st or 2:1) red brick university degree(s) � and this takes time, effort and (borrowed) money. You can earn more money in the building trade, sooner, and easier. I don�t mean to say that builders are less skilled; but why would anyone chose a career in IT in the UK.
One thing I�ve learned, you best keep learning - or find work in the government