They haven't been developing employees' abilities since the H-1B visa program was hatched in 1990.
They don't want to invest in training, or manuals (paper or on blu-ray DVDs). They want someone 20-30 years old who will "hit the ground running" and get him off the pay-roll as soon as the task is done.
The very idea of building on past development, to make products better and better, doesn't fit in most B-school bozo executives' aspirations.
Keep Up with TechRepublic