Your Guide to HP and MP

i have one quick question

if int directly relates to mp increase per level,
than why dont people put on a bunch of int equips before they level for extra mp?

they do, and it pisses me off as a mage to see a warrrior has better int equips than me -.-" also, its driving the prices of int scrolls up like no tomorrow, so only those funded people get the good int equips, and 90% of the AREN'T mages!!!!!!(didn't want to be offensive to anyone)