Social media and other addictive Internet sites - people are constantly glued to them, even on their work, which decreases their productivity. Social media also cause depression in many people, because they not only procrastinate, but also constantly compare their life to others, which leads to dissatisfaction. Also social media are good at spreading lies and fakes, which can have negative effects on the economy - anti-vax panic, anti-GMO, political manipulation and so on.
The internet or social media should be able to provide a positive influence on the country and in my opinion this has been proven in several countries with the emergence of many new entrepreneurs who open online shops. The internet or social media should not reduce the level of productivity because the aim is to speed up access and transactions