A train in Pakistan. Photo credit to China Daily. Singapore can achieve this in 2030. This is a picture of future Singapore.
bite the sand
Bite the sand
In the face of unruly behaviour, Singapore might as well bite the sand, or bullet, and stop all importing of sand and granite from Indonesia. Go for new sources, pay a bit more, slow down a little in the pace of construction, spread them out by a year or two especially those projects that are not really that urgent.
This will do a lot of good to relations in both countries.