Is it permissible to abstain from lawful measures, e.g.

Answer

It is permissible for men of high Taqwa to abandon even the lawful ways and means for the achievement of lawful objectives as was the practice of many Auliya. No one understood the Deen better than the Auliya. While people of our lowly calibre of Imaan cannot emulate the ways of the Auliya due to our lack of Taqwa and Wara', the Auliya are fully qualified for reposing their entire trust on Allah Ta'ala, which induced abandonment of even the lawful means.

While we have to adopt the lawful ways and means created by Allah Ta'ala for the acquisition of our worldly needs, it is not permissible to believe that these means can act of their own accord. The ways and means which are natural operate by the command and decree of Allah Ta'ala.