Let's put it this way. Minimum wage when implemented is usually benchmarked to basic cost of living against a fair and honest 8 or 9 hours or labour. Without minimum wage, the workers are at the mercy of the employers, take it or leave even if it can't cover basic living costs. The unions are on the government and employers' side. They have plenty of foreign workers who can afford to work for the low wages since they're not buy HDB flats. If you can't make ends meet, then ask your wife and children and even parents to work too and chip.
The argument that minimum wage legislation drives businesses away or into bankruptcy holds no water at all. If your business can't afford a wage for an employee live in basic dignity, you should be bankrupted, get the hell out of business and look for a job yourself.