Yeah, not all government would do such a thing but many do. After all, its the government who is making the profits by taxing the citizens for gambling.
Its kind of free money for them which is a solid reason why many government don't hesitate to tax gamblers insanely.
A universal regulatory framework is required so that all gamblers can be taxed the same way and provide them safety in case of frauds.
If you win, you will be taxed and if you win big, you will be taxed more considerably as taxation is a hierarchy.
Governments can set up things to tax people more if they consider gambling is a dangerous activity which need to be restricted like cigarette and smoking, alcohol drinking, for example.
With governments, it's very hard to ask for fairness from them, even you are living in a nation with democracy, it takes a lot of efforts from community and time for changes. Usually, govnerments will try to take action ahead of their citizen's responses.
