"一揽子救援计划" can be translated into English as "a comprehensive rescue/bailout package" or "an all-inclusive rescue plan".
Here are some examples of usage:
The government announced a comprehensive rescue package to support the struggling economy.
（政府宣布了一项一揽子救援计划，以支持陷入困境的经济。）
The international community is working on an all-inclusive rescue plan to address the humanitarian crisis.
（国际社会正在制定一项一揽子救援计划，以应对人道主义危机。）