The first IR will have a 'soft launch' before next Christmas. This will probably mean one hotel and one casino. It will not solve any unemployment problems in SG.
Also have to consider Sands are actually sending people from Macau TO the IR to work, as they scale back in Macau.
The Chinese government just cut the amount of Mainlanders allowed into Macau at the wrong time.....it's not so much the number of people but the number of times one is allowed to visit, so vastly cutting tourist numbers.
It could be some of those tourists that would have gone back to Macau but that are no longer allowed, may come to Singapore......but mostl likely Malaysia.