A person who works as a TD should probably be on the national average industrial wage. This would ensure a fair and reasonably balanced approach when governing the country. We all know about the corrupting influence of money.
If TDs were on this wage, they would enter into politics because of a passion, instead of a thirst for monetary gain.
Another reason I believe wages should be set a this level is because these people are being paid out of our taxes! - They are not directly generating wealth, but are living off the fat of the land.