I can understand the sentiment against foreigners, but kicking them out will NOT help the situation. I just attended a seminar this afternoon on 3D printing. The first two speakers were Israelis. They're bringing their company Stratysys to Singapore to be the service hub of South Asia, which includes Oz and India, two big(ger) markets. Because of this location (in Singapore), they are recruiting and will employ Singaporeans. You won't want to kick them out, you're not able to develop the technology on your own.
Reducing the population isn't going to help either. I don't know how else. Sorry.
Cheers!
The most important issue now is reducing population and kicking out foreigners. All others pale in comparison.