OK I did not realise, but I still think very small bonuses should be implemented for the government types on top of the domestic policies, this is because even if the bonuses were 1% or 2%, they would change the strategy slightly. Also, because you can pick domestic policies regardless of government type, it feels arbitrary, whereas having something tied to the government type makes it fell like it has a huge impact.
Also they were just suggestions, I know how OP the dictatorships would be...