Is there a political philosophy that is pro legislature?

well, i've noticed that in seperation of powers the executive and legislative branches gobble power up the longer they are around. like the judicial branch in the e.u. and the executive branch over the past 250 yrs in u.s.a. so i was wondering if any person/group believes/says this. and is then pro legislature, maybe saying that legislatures should have a slight handicap in seperation of powers.