BRUSSELS—The European Commission announced draft rules on Thursday to give many workers such as couriers for online platform companies including Uber and Deliveroo employee benefits, a move which labour unions say is overdue but some companies argue will lead to job losses. The proposal, a global first that needs to be thrashed out with EU countries and lawmakers before it can become law, marks the latest attempt by the European Union to regulate tech companies and ensure a level playing field between online and traditional firms. “No one is trying to kill, stop or hinder the development of the platform economy,” Jobs and Social Rights Commissioner Nicholas Schmit said at a press conference introducing the proposals. However, the rules are needed to ensure that new business models uphold labour laws and social standards, he said. The EU executive said the draft rules could apply to up to 5.5 million workers …