well first of all
-->http://www.eventscripts.com/pages/Category:Commands
^^ thought this would help ya

"es_xset amount1 0;es_xgetmoney amount1 event_var(userid);if (server_var(amount1) >= 14000) then damage event_var(userid) 80 32 event_var(attacker)"

first of all you have to set the variable you havent got to do that if you use the wcs_tmp vars
then you get the current money of your enemy
next is checking if this amount >= 14000 and if yes then damage him with 80 dmg of type 32 (falldamage) by you

hope that helps ya greez mobsi

find out how much cash they have... if between x and y amount wcs_dealdamage then who and amount... bla bla bla

keep in mind that damage is a BIG deal on most servers and people that can 1 shot you per hit are quickly considered jerks for playing that race... so instec fo big numbers use smaller amouts... speaking from experience a person that does 10-15 damage per hit or more with a rifle is so OP its sickening