I believe there are those who fail to understand the principles and structures of the European Union and why they were created.
Prior to the creation of the EU individual States across Europe, each had there own standards in such things as workplace safety, employee holiday rights and pay, maturity leave entitlement and much more.
Those states that maintained lower standards obviously held a commercial advantage over states such as Britain who held conditions much more beneficial to employees. However, that placed those same commercial interests based in the UK at a competitive disadvantage to those based in the European states that did not have such high standards.
At the time of the Common Market, some may well remember Maggie Thatcher haranguing other market member states by saying that there was not a "level playing field" of legislation within that market for all to operate under equally. Those words began the consolidation of legislation across Europe which eventually brought forward the European Union as we know it today.
The leaders of the leave campaign along with the right-wing press would have us all believe that such legislation is all bureaucracy and unnecessary. However, in truth that legislation has been brought forward to enable commercial competition to operate on equal standards as well as for the benefit of all those who are employed in those commercial interests, and us as consumers.