The impunity with which Indira Gandhi and her Congress henchmen amended the Constitution via the 38th – 42nd Amendments is something which sadly lives with us to this day even with the present Constitution. Indira Gandhi was only following in her father Jawaharlal Nehru’s footsteps, who with the very first amendment, had set the precedent of modifying the Constitution to suit the Government’s whims. The first Amendment put restrictions on freedom of speech, trade, and equality before law.
Through the 42nd Amendment, the Preamble was changed to “sovereign, socialist secular democratic republic” from what it used to be prior to that — “sovereign democratic republic.”
Source: Indira Gandhi’s ‘socialist’ mistake needs to be fixed
However, I can't agree with the following:
Unfortunately, socialism cannot be a goal mandated by the state. To be successful, it can only be the natural outcome of a truly democratic state.
The truth is that socialism never works. No matter if democratic or not, socialism has failed always and everywhere where it has been tried. There is not a single counterexample of a well-working socialist state. Do not even try to name Sweden. It's a highly taxed country, but still a safely capitalist one. There's not one functioning socialist economy in the whole world. There has never been, and there will never be one.