True Left

"Bali is big sources of Nusantara's tourism revenue. What about that?"

Reduced revenue means reduced carrying capacity. The best solution is to proportionately reduce the population by encouraging emigration, in particular to Australia.



Really, you should aim to get the population back down to <20 million as was the comfortable population prior to colonization. The remainder (~250 million) should emigrate to countries of Western civilization (Netherlands, Portugal, Britain plus Australia, Canada, etc.) which created the conditions that caused your population to increase to >275 million.