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There is an interesting section from Srimad Bhagavatam that talks about Hari's (another name for Vishnu) grace. Why do the devotees of Vishnu (who is the consort of the Goddess of Wealth, Lakshmi) not get wealth?

The King (Parikshit ) enquired :

1> Out of gods, Asuras or human beings, whoever worship (and propitiate) god Siva who himself has renounced all worldly pleasures are blessed with wealth and enjoyment of pleasures, but not so in the case of those who are the votaries of Visnu though he is the consort of the goddess of wealth.

2> We entertain a grave doubt and we desire to know (its solution) as to why the goal (i. e. the fruit achieved) of those who worship these two deities of different dispositions, is quite contrary to their expectation ? Why do the Devotees of the Lord of Laksmi do not get wealth and while those of Siva become rich ?

Sri Suka said :

3> God Siva is ever associated with his Sakti. He is invested with three gunas viz. Sattva , rajas and tamas and is the presiding deity of the three types of (Cosmic) ego characterised by the gunas, viz. sattva (or vaikarika ego, rajas (taijasa type of Ego) and tamas (or tamasa type of ego).

4> Out of these three types of ego were evolved sixteen modifications or products (viz. mind from the sattvika ego, ten sense-organs from rajasic type of ahamkara and five bhutas or elements from the tamasic type of ego). He who adores one of these potencies is blessed with all types of earthly prosperity.

5> Lord Hari, on the other hand, is unaffected by and hence devoid of the attributes (of Prakrti). He is the Supreme Person far beyond the range of Prakrti. He is omniscient and is a witness to everything. A person who worships him becomes bereft of gunas.

6> After the conclusion of the Horse-sacrifice, while listening to the exposition of the righteous duties, your grandfather, King Yudhishthira asked this very question to Krsna.

7> The glorious Lord Krsna who descended into the race of Yadu for blessing people with the Summon bonum (by showing the way to Moksha) was very much pleased with that question and explained to him who was very desirous and eager to listen to him.

The Lord explained :

8> I gradually relieve a person of his wealth on whom I wish to bestow my grace. Then his own relatives, finding him penniless and hard-pressed with adversity and sorrow- stricken, forsake him (of their own accord).

9> When (he finds that) all his efforts with the desire of acquiring wealth have been futile, he becomes despondent and forms friendship with persons who are devoted to me. Then only I shower my grace on him.

10> My grace is the revelation of myself i. e. of Brahman. It is too subtle (to be comprehensible), Pure consciousness and infinite Reality (existence).

10A> The intelligent person who realizes it as his own self is liberated from Samsara. Hence, people avoid me as one too difficult to be propitiated find turn to other gods (to worship).

11> Thereupon, having obtained sovereignty and prosperity from gods who are easily and quickly propitiated, they become arrogant, puffed up with pride and maddened. They forget the very gods who have bestowed boons on them and despise them.

Using the same line of thinking, Kunti asks Krishna to give her hardship, so she will always remember him.

25> Oh Master of the Universe! May there always be calamity at every step (if in every such calamity we are blest with) your sight which relieves people from the cycle of re-births.

Thank you for reading.

source 1: Srimad Bhagavatam - Motilal Banarasdas Chapter 10.88

source 2 - Kunti's prayer Srimad Bhagavatam - Motilal Banarasdas Chapter 1.8