It was under his stewardship of the Union Rural Development Ministry that NREGA, the flagship rural livelihood scheme, was implemented.
The case was last week transferred from South District to the Crime Branch.
In his letter to Kumar, the veteran leader has made a series of suggestions including an amendment in Mahatma Gandhi National Rural Employment Gurantee Act, bringing Lord Buddha's begging bowl from Kabul and hoisting tricolor at Vaishali, the land of world's first Republic.
In the four-paragraph letter, Jaitley said he had orally informed Modi about his desire not to be a part of the new BJP government to enable him to concentrate on treatment and health.
'Reports in a section of media regarding Union Minister Shri Arun Jaitley's health condition are false and baseless. Media is advised to stay clear of rumour mongering,' Government Spokesman Sitanshu Kar tweeted.
Replying to a discussion on the Jammu and Kashmir Reorganisation (Amendment) Bill, he also slammed some Opposition members for their claim that the proposed law negates the hopes of the region getting back its erstwhile statehood.
Launching the Ayushman Bharat scheme via a video-conference to extend health insurance benefits to all residents of Jammu and Kashmir, he said the three-tier panchayat system has fully taken shape in the UT, describing it as a realisation of Mahatma Gandhi's dream of 'gram swaraj' (village self-rule).
The death toll climbed to 20,642, the updated data at 8 am showed. Amid surging cases, the health ministry said it has roped in specialist doctors from the AIIMS here to provide expert guidance and knowledge support on COVID-19 to doctors manning ICUs in state hospitals, in an effort to reduce the fatality rate.