pl answer this riddle

Snot.

Aborted fetuses?

Rich man keeps me in the pocket: another way of saying rich people keep their abortions secret.

poor man throws me away: to the dumpster with the dumpster baby!

kids eat me: well, I guess we're dealing with cannibal kids...

Essentially it's something a rich man values, a poor man has no use for, and kids find edible. Leaves this to be a food or candy. A poor man values food or candy, stereotypically, so this makes no sense.

hence aborted fetuses and cannibal children

Money...
No, seriousl, think about it...
Rich men stay rich by keeping their money,
poor men "throw it away" by spending it to survive,
(Ridiculous, but true) kids shove money up noses or eat it.
Not all children are cannibals... And not everyone throws their aborted fetuses in dumpsters!

Tears.

rich men use hankercheifs
poor men use tissues.
children let them run down their face and into their mouths.