Bill Gates to suggest raising taxes on tobacco worldwide

From this article that focuses on a Robin Hood Tax but also includes tobacco tax:
In addition to the FTT, Gates's report will likely suggest raising taxes on tobacco to the World Health Organisation (WHO) target of at least 70 percent. If fully implemented by the G20 and the rest of the EU, according to the note, revenues could reach 170 billion dollars a year, "a small part" of which could be earmarked to a "Solidarity Tobacco Contribution" for global health agencies, such as the WHO, the Global Fund, and Unicef, among others. What are the obstacles to raising tobacco taxes in Africa? The influence of the industry, the weakness of the tax/customs administrations, the prevalence of smuggling, the diversity of the situation in neighboring countries, the lack of motivation for political leaders?