In a free-market system, the groups of players that make all of the economic decisions are consumers and producers.
Consumers decide what to purchase, influencing demand, while producers decide what to supply based on their production capabilities and market conditions. Together, these two groups interact in the marketplace to determine prices and allocate resources. Economic experts and government planners may have influence, but they do not make decisions in the same direct manner as consumers and producers do. Workers also play a role in the economy, but primarily through their participation in production rather than making overarching economic decisions.