Harper's net worth is $3M more than Trudeau.  He acquired all of that as a politician.  He also abused taxpayers more than any other PM. 

For Harper's ministers, pictures are worth millions: spending records
http://ipolitics.ca/2015/02/19/for-harper-government-pictures-are-worth-millions-ministerial-spending-records/

Canadians pay the high costs of Stephen Harper’s Conservative propaganda machine
http://www.joanbaxter.ca/2015/03/01/canadians-pay-the-high-costs-of-stephen-harpers-conservative-propaganda-machine/

In 2014, the Conservative government spent $263 million on 3,325 spin doctors. That rivals the cost of the House of Commons itself.
https://www.thestar.com/opinion/commentary/2014/08/03/ottawas_spin_doctor_payroll_rivals_that_of_the_commons.html

Conservative John Robson calls Harper crass, cynical and dishonest. 
http://news.nationalpost.com/full-comment/john-robson-i-cant-vote-for-the-harper-conservatives-i-just-cant