Rearrange the parts of the sentence in correct order
Every government wants
P-all, they have so many votes
Q-to shower favours on
R-farmers; after

Let's logically link the sentence fragments starting from the introductory phrase "Every government wants":
The transitive verb phrase "wants" needs an infinitive object or action to complete it. Part Q begins with "to shower favours on", which perfectly links with "Every government wants".

"shower favours on" needs an object showing who receives these favors. Part R starts with "farmers;", which satisfies this requirement.

Part R ends with a semicolon followed by "after", which combines with "all" in part P to form the coherent conjunction phrase "after all".

Part P completes the sentence with the reason: "after all, they have so many votes".

Combining them gives: Q → R → P.
Full Sentence: "Every government wants to shower favours on farmers; after all, they have so many votes."