Tony Abbott demonstrates an awareness of appropriateness (this is not a joke)

On the 3rd of September 2013  Tony Abbott was one of four politicians who delivered  a short pre-recorded pitch to the housemates of the Gold Coast's Big Brother House with the intention of rallying votes for the then-upcoming federal election. Both the short nature of the pitch and the audience to which it was directed necessitated a slightly different linguistic approach to be undertaken by Abbott in order to achieve his aim of gaining votes. 

Instead of bombarding the prospective voters with a political-jargon laden spiel on Liberal policy, Abbott tailored his speech to facilitate covert prestige and solidarity with his audience by means of:

•  Flanking himself with his two "not bad looking" daughters who are similar in age to the particular demographic to which his pitch was directed promotes his identity as a parent to which the house mates can relate
• Promoting his highly relatable identity as a "parent" and a "guy" functions to lessen the degree of social distance between him as a politician and them as civilians
• Catering to the positive face needs of his daughters by referring to them as his "best assets" by extension functions as a politeness strategy towards the house mates who are also "assets" according to "all parents"
• Linguistically, Abbott employs non-standard pronunciation of the verbs "want to" and "got to" by reducing them so as to mimic the casual, informal way in which these lexemes are typically used in spoken language by young people in particular. 
• The non standard lexeme "reckon" and reduction of "we have" function in a similar way
• Employing the collective pronoun "we" has a dual function in further promoting solidarity and rendering the house mates complicit to the contentions of Abbott that "we've gotta change the government that we've got". The degree of obligation is heightened connotations of high modality of the non standard verb "got to"
• Abbott ends his pitch on a politer note "so please don't forget to fill out those applications". This topic management ensures that the crux of the information is delivered last so as to ensure it is remembered by the house mates.

Abbott's unprecedented shift towards informality indicates an astute awareness of the descriptive concept of appropriateness rather than correctness. From the young age of his audience and the relaxed context in which he appears, Abbott was able to gauge that the most effective way of promoting himself was to manipulate the assumed linguistic paradigm of the house mates and make his pitch as relatable to them as possible through use of non standard language choices and assertion of common interests.