Sinclair Davidson is back to his long standing favourite line of arguing that because the Australian government's tax revenue (when looked at as a simple dollar figure) has, after a post GFC dip, continued to climb since the Howard government, this actually means there is no "revenue problem" but only a spending problem.
Funny how he doesn't mention either population growth (21,542,000 in September 2008, and 23,581,000 in September 2014 - close enough to a 9.5% increase). Or the growth in GDP. (Not sure if inflation has been factored in; maybe it has?)
In short - of course revenue should have grown over the period in dollar terms; the question is whether it is growing at expected rates to cover expected needs of a growing, aging population. To dwell on the rise without context is just ideological propaganda.
And as for arguments about what government is better at covering rather than private enterprise: the recent DeLong/Krugman writings about it are of great interest.
Update: I see Andrew Bolt continues his gullible following of any argument Catallaxy runs and re-posts the Davidson graph and line.