I'm not blaming the legislation, I'm blaming him for ignoring it. Using sub- contractors to evade employment taxes, for instance, is illegal in the UK. Somehow Amazon (and similar others like Uber) are above that. Jo Maugham QC (tax lawyer) has aledged that there is some kind of sweetheart deal with the UK government with regards to US tech firms, and brought a related case against Uber for using a similar ruse to evade sales tax.

[0]https://goodlawproject.org/uber-case/