A politician who actually manages to change the tax code is an example of someone who effectuates change.
transitive verb-·at·ed, -·at·ing
Origin of effectuatefrom French effectuer ( from Classical Latin effectus: see effect), with ending after verbs in -ate (e.g., actuate)
transitive verbef·fec·tu·at·ed, ef·fec·tu·at·ing, ef·fec·tu·ates
Origin of effectuateMedieval Latin effectuāre effectuāt- from Latin effectus an effect ; see effect .
(third-person singular simple present effectuates, present participle effectuating, simple past and past participle effectuated)