NEW YORK (Reuters) - Traditionally fat expense accounts on Wall Street are about to get slashed as major banks set out to cut spending and staffing due to weaker markets and new regulation that will cut in to their profits. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=0IYCzcB-GxI:Q_0b7wYrm5s:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=0IYCzcB-GxI:Q_0b7wYrm5s:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/0IYCzcB-GxI)