The keys to provisions..
One of the best ways for at taining happiness and tranquility is to rely upon the Almighty Lord, the Provider, and trust Him with regard to sustenance, care, and protection.
{Indeed, my protector is Allah, Who has sent down the Book; and He is the ally of the righteous.}
[Surat al-A‘rāf: 196]
When Allah takes care of someone, He puts piety in his heart, which is one of the greatest means of sustenance, far better than all economic theories.
{And if only the people of the cities had believed and feared Allah, We would have opened upon them blessings from the heaven and the earth; but they denied [the messengers], so We seized them for what they earned.}
[Surat al-A‘rāf: 96]
{...And whoever fears Allah, He will make for him a way out,and will provide for him from where he does not expect...}
[Surat at-Talāq: 2-3]
It is an immutable law of Allah in this world that sustenance is linked to obedience to Him:
{And if only they had upheld [the law of] the Torah, the Gospel, and what has been revealed to them from their Lord, they would have consumed [provision] from above them and from beneath their feet...}
[Surat al-Mā’idah: 66]
Conversely, sins preclude sustenance and remove the blessing:
{Corruption has appeared throughout the land and sea by [reason of] what the hands of people have earned so He may let them taste part of [the consequence of] what they have done that perhaps they will return.}
[Surat ar-Rūm: 41]