Is it possible to achieve economic change without achieving political change first?
When political institutions are dominated by the power of the private economy, by multinational corporations and foreign investors, or even domestic private business interests, they become impervious to popular influence.
You cannot achieve economic change through political institutions when those institutions are controlled by private economic interests. So, achieving economic change, and indeed, achieving political change, should not be sought through these institutions, but rather through the entities which control them.
You need to go directly to the corporations and foreign investors and convince them to recognize your economic sovereignty and political independence. You convince them by imposing consequences on their profitability and operational efficiency. Once you liberate your political institutions from corporate occupation, you will be in a position to implement progressive economic reforms.