Budgets are forecasts, and more than most, Josh Frydenberg and Treasury waved a wet finger in the air in compiling the 2020 version. How many companies will now employ a new apprentice for $100 a week subsidy? Which back-of-the-envelope showed 3.5 million businesses would use the instant asset write off? And the $17.9 billion for super savings based on the YourSuper proposal is wishful thinking.