Simplify the following text for a Grade 15 native English-speaking person.
Original: Mercantilism suggests that the ruling government should advance these goals by playing a protectionist role in the economy by encouraging exports and discouraging imports , notably through the use of subsidies and tariffs respectively .
Simplified: Mercantilism suggests that the ruling government should advance these goals by playing a protectionist role in the economy by encouraging exports and discouraging imports , notably through the use of tariffs and subsidies .