Although it is possible and you have mentioned an example, but do we know about the reality or the implementation of the limit, whether it is being really applied or it is just a written regulation which can be bypassed easily?
If you ask me, I do not think government should do it because it is against people's freedom as I believe most gamblers will act against this kind of regulation and will start to find alternative casinos to play once the limit is reached.
Governments are the ones who create regulations and rules and they hope these rules are effective in preventing more people from losing all their money gambling. These restrictions are intended to prevent gamblers from losing their money due to their inability to control their spending, but there will always be those who break the rules and find ways around them. Even if there are restrictions, I don't think the government would expect the success rate to reach 60% to 70% and I just think the percentage could be lower than 50%.
Yea, Government is responsible for doing that but the problem is implementation, they can make the rules but implementing will be a major problem because most persons will not listen and off course we can not have government everywhere just to monitor this unless it is a country with little population but even with country with little population where they can assign people that will implement this to everyone, I believe people will still gamble online and it will be hard to stop or notice someone that is gambling from his or her comfort zone.