Prat leya jo naam hamara , tehi din tahi na mile ahara .
Some devotees are such that they do not take food even as in case of Hanumanji and therefore he is called jitendriya . See what Krsn says…
Vishayaa vinivartante niraahaarasya dehinah
Rasavarjam raso’pyasya param drishtwaa nivartate.
The objects of the senses turn away from the abstinent man, leaving the longing
(behind); but his longing also turns away on seeing the Supreme.
And therefore the devotee is fully devoted to parmatma . This is not a matter of surprise as goswamiji writes…
Sumirat Ramahi tajahi jan , tran sam Vishay vilas .
Hanumanji wants his life for namjap and not for food , sitamata blesses him having all the physical pleasures where he lives .
Sthitam twamanushyanti bhogah sarve mamagyya .
However this does not envolve the caste system also
There in Krsn period only Varna arrangement was in the life.See Krsn when was in Gokul, he was a Gopal means Vaish varna , he when moved to Mathura and killed Kansa, became kshatriya varna again as chariot driver he followed the orders of Arjun and was Shudra varna , thereafter going to Dwarika, he was king and Kshatriya varna. Similarly Drona was Brahmin varna and became kshatriya varna when fought .Karna was shudra varna and when , made king by Duryodhana , he fought as kshatriya varna and when
his varna as shudra was challenged by Arjun . Shalya, the maternal uncle of Arjun was deployed as chariot driver of Karna , he followed the orders of Karna and acted as shudra varna .