Politics and economics: the two-way highway

Is it the economy? Is it politics? The chicken or the egg? This is the question today in Argentina, where there is a debate regarding which is the biggest obstacle to turn around an economy that has been stagnating for more than a decade.  Obviously, a switch towards better economic policies is necessary, but the key question is whether the main obstacle is reaching a good diagnosis of the situation, designing a comprehensive program or if the issue is that implementation requires a political leadership and vision until now elusive.