There is a much stronger mechanism in place now. Rules are clearer as to what can be claimed as an expense, and there are requirements to enter non-partliamentary work on a register of interests. They have also created IPSA, to whom an MP can be referred. Problem is though, that unless they do something lllegal which results in a prison sentence, Nothing else - other than public approbation - can be done. In theory, someone can be elected an MP for a constituency; and promptly go on a 5 year salaried and expensed holiday.
This is why above all else, we ought to have a right of recall - to create a genuine possibility that a sitting MP can be effectively punished if they are demonstrably inept or venal.
As for the Lords - as it currently stands, each successive government appointments sufficient life peers to gain a majority -or at least parity within the Lords - and now we have 1,000 of them. Un-needed. I really do think we need a fully elected second chamber, whose role is to scrutinise legislation and to act as a court of appeal etc.
As with MPs, such elected individuals would also be subject to a right of recall.