Who is controlling Portuguese Parlament deputies ?

Nobody is really controlling the activities of the Portuguese Parlament deputies.
Why do Portuguese Parlament deputies have other "jobs" other than the job they have been elected for ?
Are the responsabilities of analysing and deciding Portuguese laws a simple task that leaves them with lots of free time ?
When we look at everyday news and see lots of weak laws that are misused by cleaver law firms/lawyers we can easily find out why is this hapenning !!!
Supposing that the job of Portuguese Parlament deputies is really easy, then I believe that there should be a considerable reduction in the number of Parlament deputies. This would save lots of money that could be better applied to hospitals and schools.

Guluseimas