The importance and political positive impact of the international and EU economic and political sanctions issued in the case of Burma/Myanmar in the last 21 years

Are sanctions or, as the EU calls them, “Restrictive Measures”, the right means to counteract violation of international obligations, or not? Are they a helpful tool or are contributing to the humanitarian disaster of affected populations?
Are sanctions the cause of poverty, forced displacement of populations, trafficking in women, child labour, and health crises? Or the policies of governments, that violate international human rights norms, cause all such negative impacts, often in countries that are potentially rich, but who lack a shred of democratic governance and respect of fundamental human rights?