Smoking mirror
Ships Captain
Actualy it was the invention of socialism that helped bring about fascism, as many traditionl liberal nations rushed towards totalitarianism to save them from the "Red Rabble", if anything Das capital should allow an anarchy free switch to despotism or fascism. 
Actualy I agree that anarchy quashing wonders would be a good idea. Perhaps they need not be wonders at all, but social engineering projects..
Civic/social engineering projects
How about a new categoy of city improvement, these would be built just like a building or small/great wonder, but when complete would result in a set temporary social event.
Example; Economic asessment.
cost 200 shields.
result; allows a preview of what your ecconomy would be (corruption and waste in each city) under a different government.
Social reorganisation;
cost 400 shields.
Allows a anarchy free (or one turn) transition to another government type. Represents a carefully planned change of government through peacfull means, with lots of propaganda to ease the transition.
Capitalisation;
cost 80 shields.
Shields are only converted to capital once all 80 shields have been gathered.
Army recritment drive;
cost 500 shields.
drafts one conscript unit in every city without causing unhappyness. Even effects cities too small for conscription normaly, representing a last ditch call to arms in defence of the city.
Theres lots of other projects you could have, and lots of odd rules that could be represented with this function.

Actualy I agree that anarchy quashing wonders would be a good idea. Perhaps they need not be wonders at all, but social engineering projects..
Civic/social engineering projects
How about a new categoy of city improvement, these would be built just like a building or small/great wonder, but when complete would result in a set temporary social event.
Example; Economic asessment.
cost 200 shields.
result; allows a preview of what your ecconomy would be (corruption and waste in each city) under a different government.
Social reorganisation;
cost 400 shields.
Allows a anarchy free (or one turn) transition to another government type. Represents a carefully planned change of government through peacfull means, with lots of propaganda to ease the transition.
Capitalisation;
cost 80 shields.
Shields are only converted to capital once all 80 shields have been gathered.
Army recritment drive;
cost 500 shields.
drafts one conscript unit in every city without causing unhappyness. Even effects cities too small for conscription normaly, representing a last ditch call to arms in defence of the city.
Theres lots of other projects you could have, and lots of odd rules that could be represented with this function.