The statistic you quoted would highly likely very easily apply in any country in the world.
Houses of Parliament: Politicians own an estimated $370m of property
Add to that the rather generous perks they get as politicians, and they have it rather comfortable.
Eye-watering extent of pollies’ perks
Then they wonder why there is such an uproar when they try and impart their "wisdom" to us plebs
Coalition MP tasked with housing affordability says 'highly paid job' is 'first step' to home ownership
Joe Hockey's advice to first homebuyers - get a good job that pays good money