I’m with Dr Alf, raising the skills of the indigenous workforce is going to take a very long time, as the UK state education system is at best 23rd in the world for literacy and numeracy and perhaps 44th overall.
Auctioning work permits is not going to get people into the country fast enough as many will be put off by a more onerous process.
The proposals do not address low UK worker productivity nor do they deal with laziness, poor motivation and the idea that UK workers are “above” certain types of work.
With postal workers, tube drivers, warehouse workers and fast food restaurants, the answer is robots and trades union de recognition. In other areas, the immigration limits have to be relaxed in relevant areas and benefit recipients must in parallel be compelled to do useful work in exchange for their benefits.