I'll just make one comment about training. One ought to distinguish in the training debate between training of new workers coming into the labour force and retraining of workers who have lost their jobs through layoffs or technological shock or whatever, a lot of which happened in the 1990s and the early 2000s.
The evidence on retraining of people who have lost their jobs and have come into the workforce is mixed. People find jobs through training, but they very rarely recoup the wage level they had before the job loss took place, and I think that's where the tax-transfer type of redistributed systems are really quite important.