Info graphics are a great way to get information out there in a way that people are willing to engage with and share. However, one thing these graphics should have is a source for the information. If you are making a claim based on specific evidence, then in the text or the graphic there should at least be the source, if not the URL for where that information is coming from. This makes it easier for people to find the information, and it helps prevent accusations of misrepresentation of information.
The link in the text takes you to a National Party page with information about the recent budget, with scant reference to inflation or average weekly wage. In the past the National Party have been pretty good about citing sources. But they have failed this time.