Hiring developers and technical staff outside of the UK

Across our US client base we’ve witnessed a steep increase in the number of development and other technical staff being hired as home based workers across the world in the last 6 months.
In some respects this is not that surprising as the costs of hiring such staff in the United States are spiralling as demand increases with what appears to be limited supply.
Many companies have allied themselves with universities in various parts of the world to attract young graduates who have studied in the precise areas required. It appears these personnel can be brought on at a fraction of the price in the US.
Companies have naturally been slightly deterred from such hires due to the complexities of hiring in different jurisdictions although there are ways and means to do this and bizarrely these can attract some favourable tax treatments.