Measures to stamp out MPs' travel rorts rely on a politicians' honour system and policing by the same department that oversaw a host of extraordinary taxpayer-funded trips, in changes described as ''weak'' and ''minimal''.

Under the new rules, politicians will continue to monitor their own expense claims, requiring them to simply sign a declaration promising they have not done the wrong thing when they submit their expenses to the Department of Finance.

Confident: Prime Minister Tony Abbott believes the new system will restore public confidence in his party. Credit:Getty Images

The changes also give the government the ability to name and shame politicians who file multiple incorrect claims in Parliament. If they are found to have done the wrong thing, they will have to repay the money and will be fined an extra 25 per cent of the value of their claim.

The changes will also clamp down on politicians claiming expenses on weekend stopovers at destinations en route to Canberra, toughen the rules around politicians bringing their spouses on trips and stop politicians employing relatives in parliamentary or electoral offices.