Sixty-eight Conservative and independent MPs, many of whom are current or former ministers, plan to retire from the Commons before the next election.
Among them, 34 MPs have declared expected annual income totaling over £2.5 million.
These MPs have also taken numerous all-expenses-paid trips funded by foreign governments and lobbyists, worth millions collectively.
The revelation comes as the Conservatives face dire polling, suggesting a potential electoral wipeout.
A transparency campaigner criticized departing Conservative MPs for focusing on securing lucrative jobs instead of their duties as politicians.
Eleven MPs listed jobs worth over £100,000 a year, with the most notable being Brandon Lewis, who took on five new roles worth £410,000 a year.
The most lucrative jobs were with LetterOne Holdings and FM Conway, worth £410,000 and £200,000 a year respectively.
Former chancellors Kwasi Kwarteng and Sajid Javid also registered for jobs worth £98,600 and £321,000 a year, including a £300,000-a-year advisory role for Javid with Centricus Partners.
Former deputy prime minister
Dominic Raab began working for private equity firm Appian Capital in January, with an annual salary of £118,000.
He is required to work for the company roughly one week per month.