LONDON (Reuters) – Britain’s finance ministry set out options on Monday for how the tax system could be reformed to encourage companies to invest more, something finance minister Rishi Sunak has said he wants to do to fix the country’s weak productivity growth. Data from the Organisation for Economic Co-operation and Development shows companies in Britain invest the equivalent of 10% of gross domestic product a year, compared with 14% in similar countries, the ministry said. Prime Minister Boris Johnson has promised to deliver a high-wage economy but to do that his government must improve Brit…