The public servants;
who gets guarantteed salary from the nation including all facilities viz. dearness allowance which increases in every six months, house rent allowance, city allowance, medical facilities, education facilities to their children, bonus without assurance to work, pension till life and huge retirement benefits vice versa no reliabilities to have an office at their own like other shopkeepers/citizens have to maintain,
are bonded to fulfill their national responsibilities when the nation need them including posting at war front posts. Census duty, election duty, emergency duty due to natural calamity etc. are their first duty for which they can be called at any time without any prior notice.
Those public servants, who refuse to perform their national duties, are liable to have imprisonment beside their property, which they earned from public/national money, can be seize.
It is simple provision in constitution.