Bernard Woolley gently reminds him: "I think you mean the brake."

These days we like to think that our economic bus is guided by the steady and independent hands of the Reserve Bank.

Even so, the Reserve Bank seems to be having trouble at the moment making the economic bus perform as well as it should.

With interest rates at 0.1 per cent, it cannot lower them any more. And at that level it seems the Reserve is fuelling a property boom, with investors churning their increased equity from earlier purchases back into ever more property purchases, cutting out struggling first home buyers.

Australia's economic wellbeing and social cohesion are dependent on the resolution of this dilemma. Low rates are needed to stimulate business activity, which drives employment. But higher rates are needed to remove some investors from the housing market, to boost home ownership - one of the historic ingredients of social cohesion.

Added to that, property has always been a more stable investment than shares. People will do anything but sell their home in a fire sale. This holds up prices. Also, they cannot sell part of their home in the way they can sell part of their stock portfolio, thus depressing share prices.

Moreover, in most markets, fear dampens greed. But in the Australian property market, fear - the fear of missing out - is adding to greed to inflame prices.

Added to this are the massive tax breaks we give property investors - negative gearing and capital gains concessions.

What can be done? The Reserve has come under fire for not cutting rates earlier to boost investment in the real economy, or for cutting them too soon, or for not increasing them, thus boosting speculative investment in property.

But that might be a bit unfair. To stretch the bus analogy a little further, the Reserve only has access to the brake pedal. It can push down on it (increasing rates) or release pressure on it (reducing rates). And that is about it.

The Reserve has no control over the steering wheel, the accelerator, any of the other controls across the dashboard or even which map or what sort of fuel is to be used. Those controls are in the hands of governments (mainly the federal government) and the private sector (both national and international).

So, what can the Reserve do? Basically, nothing, as attested by Reserve governor Philip Lowe's constant pleas to the government to act, especially by spending more on infrastructure to create jobs.

The Reserve cannot throw the cold water of higher interest rates on the property bubble without those same higher rates putting a dampener on other job-creating business investment.

The answer to getting a steadier ride on the economic bus lies with using more than just the brake pedal. Unfortunately, it will also require some imagination and political courage, which are in desperately short supply these days.

The key is to make the interest rate on speculative property investment higher while keeping the interest rate for owner-occupiers and for businesses outside property lower.

It seems impossible, but it can be done. The way to do it is to impose a tax, slowly rising to, say, 2 percentage points, on all non-occupier housing loans.

Gasp! But it would do the trick. It would dampen the investment frenzy, dampen housing prices and provide a fund for infrastructure spending.

But if truth be told (which is not often in politics), the government does not care a whit about the housing crisis for young people. It is more interested in the two-thirds who own dwellings than the one-third who do not.

This is why governments use the weasel words "housing affordability". They want to attack the "housing affordability crisis". But the only way to make housing more "affordable" is to reduce prices. Any government that puts in policies to do that would cop a voter backlash.

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One of the reasons treasurers Peter Costello and Paul Keating were happy for the Reserve to get independent control of interest rates is that it enabled them to avoid the flak when they had the responsibility of increasing rates.

So governments tend to avoid anything that would take the heat out of the property market, like ending the tax breaks.

Instead, they dishonestly attack "affordability" with dumb schemes to subsidise first home buyers with "grants". All these do is add fuel to the frenzy, as first home buyers bring forward their decision to buy out of fear of missing out on the freebie.

Equally dishonest are the proposals by a claque of Coalition MPs to enable first home buyers to access their superannuation funds for a deposit. Not only would these proposals increase demand, and hence prices, but it's obvious they have less to do with home ownership and more to do with undermining the universal superannuation scheme, which dares to have a high-performing non-profit segment and gives the proletariat access to a decent retirement.

In short, the independent Reserve which wants to do something cannot, and the government which can do something does not want to.

Vaccines. Here we go again.

Try every private-sector, deals-for-mates, money-for-business scheme and wait for the inevitable failure before coming to the obvious conclusion: the most effective, cheapest, safest way to vaccinate the population of Australia is for mass, publicly run vaccination centres - town halls, schools, sports grounds and so on.

This is a public health matter, not a market.