He's the former Treasurer who once told Australia the 'age of entitlement is over'.

But now firmly ensconced in his new role as the nation's Ambassador to the United States, Joe Hockey has spent $70,000 worth of taxpayer's money in just six months.

The cash splash between July and December 2017 went on alcohol, breakfasts and childcare, Freedom of Information documents obtained by the Herald Sun reveal.

Ambassador to the United States Joe Hockey (left) this month uploaded this photo to his Instagram account with the caption: 'Guess who I ran into on the streets of Washington DC? Wow! #rayban #dc #thebachelorette'

Mr Hockey is pictured in golfing attire, next to a set of golf clubs, in a photo uploaded to his Instagram account, which was captioned 'I am in love'

The former treasurer captioned this Instagram selfie 'Another day in the office'

'My favorite Washington DC restaurant. Even better in Miami. Good, simple, fresh, convivial', Mr Hockey captioned this photo which was uploaded to his Instagram account

There was a dinner for 44 guests ($4335), a party for a retiring public servant ($3165) and a $2535 bill for hosting a reception while Foreign Minister Julie Bishop was in town.

Mr Hockey also billed taxpayers $3072 for flowers and $1521 for parking, cleaning and laundry, in addition to the bulk-alcohol spend ($2660) and $3340 charge for babysitters for his young children.

The expenses were reportedly justified as 'supporting Australian businesses abroad' and a usual tool in building contacts.

A spokeswoman for the Department of Foreign Affairs and Trade, who answered questions on Mr Hockey's behalf, also said the expenses were in accordance with departmental policy.

'Ambassador Hockey used his representational funds in accordance with departmental policy to offset childcare costs when he and his spouse were required to support the work of the embassy,' they told the Herald Sun.

In a statement to Daily Mail Australia, the spokeswoman added: 'The expenditure and work-related activities outlined in Ambassador Hockey's representation returns are in accordance with the Department's Finance Management Manual and the Human Resources Manual'.

Mr Hockey had his photo taken with Australian band Human Nature while in Las Vegas

The Ambassador took a video of himself attending an ice-hockey match in Washington D.C

Mr Hockey pictured meeting U.S. President Donald Trump

Mr Hockey is pictured in Las Vegas (left) and in Germany (right)

The former North Sydney MP is pictured with Jerry Springer (left), who Mr Hockey described as 'smart, wise and worldly'

The former North Sydney MP has been Ambassador to the United States since early 2016 after quitting federal parliament.

Mr Hockey's Instagram account shows the former Liberal politician appearing to enjoy his new life in the United States, where he is based in Washington D.C.

The ambassador has uploaded a number of photos of just himself and then with popular public figures while out and about in the United States and in other international locations.

'Guess who I ran into on the streets of Washington DC? Wow!' Mr Hockey posted with a series of hashtags accompanying a photo, one of which was #thebachelorette.

A picture of him next to golf clubs was captioned 'I am in love' and alongside a selfie outside a restaurant, Mr Hockey wrote 'My favorite Washington DC restaurant. Even better in Miami. Good, simple, fresh, convivial'.

There are also snaps of him in Vegas with Human Nature, meeting U. S. President Donald Trump and with Jerry Springer, who Mr Hockey described as 'smart, wise and worldly'.

Mr Hockey, who earns a reported $360,000 a year, in addition to his parliamentary pension, lives with his wife Melissa Babbage and their three children in the ambassador's residence, White Oaks.

Mr Hockey is seen here with his wife Melissa Babbage and their three children when he first moved to the United States in 2016, pictured with then U.S. President Barack Obama