Should lottery winner share a portion of their winning?

if anybody playing lottery does any govt. or person participate to share the loosing amount with that person who is a looser in lottery?

if the answer is no then why govt. claim taxes on his winning amount ?

actually our govt. make some laws for there own profit, but normal public always found their self looser, whereas these public are selecting the govt.

if the person who is a lottery winner, wants to donate some amount by his own decision it is possible, or when govt. taking the responsibility after born of that person, that govt. can claim a part of that person's winning amount.

This is my own feeling.... may be I am wrong / right but this is from my thought.

thanks...