This is why you should not talk big and blame your small brother for all your woes. SG-JB is a Symbiosis of coexistence and needed each other to support and grow, otherwise it will be the same like Rantau Panjang in Kelantan or Bukit Kayu Hitam in Kedah where all drive to Danok for stuff.
One way is to Bite the frigging bullet and barricade Johor off from rest of Malaysia and check EVERYONE in JOHOR. Costly, but that will be the small step towards cleaning up the illegal immigrants and other criminal and viral activities.
Then we slowly get things done and grow the economy. Poor Malaysian friends who need us and we too, poor us who are suffering cos of the high fuel and food costs.
Otherwise, Bintan could do the same and we all flock there.
You see, Singapore NEEDS the workforce to get things running, such as construction and services and we need an outlet to spend the money and get that itch out. We need to relax too. Being cooped up at home, SLS HLE WFH all are draining our mental might and we might be breaking into shatters when this is over.
Forget the airport, we can forgo that, we need our massages, hot spa and other stuff...and FOOD .. DELICIOUS FOOD. Don't forget one full shopping trolley in SG could cost about $300 compared to RM300 in Malaysia with like for like.
Yes, Malaysians will make noise that they cannot get into Johor without passport and checks but if every state is cleared, of pests, illegals and viruses, then we all can enjoy. 400,000 Malaysians can come to work and thats at least $500M or RM1.5 billion spent in Malaysian economy monthly.