The Milroy and Milroy hypothesis (i.e. that there is a Standard Language Ideology (SLI)) seems to be predicated on the notion that all languages are in the same kind of sociolinguistic situation, and go through the same kinds of stages of standardization. This is surely an unexamined and unprovable hypothesis, but serves the ideology that standardization not only cannot be shown to exist, (i.e. standardization is a figment of someone's imagination, a mere social construct) but that the ideology that fosters standardization is hegemonistic, imperialistic, and hurtful. Not much evidence is given for the universal application of these two claims.
Since the SLI is an unproven hypothesis, we may treat it as itself an ideology, the SLI Ideology. It views standardization as hegemonistic just because English is a language spoken beyond its borders, and because exonormic standards of English pronunciation etc. are demanded of speakers who will never be able to meet the demands of the norm, mostly because the evaluators will constantly (and unfairly) shift the criteria to make attainment impossible. But there are differences between standardization of a language like Tamil and languages of wider communication like English. For one thing, Tamil is not a LOWC (Language of Wider Communication), so the notion of hegemony over other languages does not arise. Secondly, Tamil already has a standard literary language; with the focus on standardizing the spoken language, different issues come to the fore.