The policy isn't weak at all. It has succeeded in what it set out to, namely to drive property prices back up to boom levels at the expense of everything else. What is "weak" is the moral compass guiding the policy.
When the Financial System collapsed in 2008 governments around the world (through their Central Banks) printed money in order to put cash back into peoples bank accounts. That's what recapitalising the banks meant; making up new money and putting it back into the current and savings accounts of ordinary people. They then printed far more money in order to continue to pay teachers and nurses and all State employees. They then kept that going in order to stimulate the economy. The net result was roughly a doubling of global money supply since 2008. In 2020 alone the US increased money supply by 26%. The net result is that those who owned capital before 2008 have seen a massive increase in the value of that capital (mainly houses and pensions) and those who do not own capital (young people) have seen a corresponding decrease in the real value of their income relative to capital values.
Ireland is a small open economy so anyone who thinks that our housing boom is the result of Irish government policy is an idiot.
Given that political decisions have more than doubled the wealth of older people (property and pension owners) in the last 13 years a Wealth tax that excludes property and pensions isn't a wealth tax at all.
To all the comfortable middle aged (like me) and elderly people out there with hundreds of thousands or millions in property and pension assets; you didn't earn your wealth, you lost more than half of it and political decisions gave it back to you at the expense of the young. While you are at it remember when you are whinging about the increase in the wealth of billionaires the exact same factors have made you rich.
SF's policies are populist and short sighted. They know what's true and choose to ignore it. They are no different to the Tories who pick on immigrants and dark skinned people in that they single out a minority that the chattering classes dislike and tell us that we aren't part of the problem, that minority is. The reality is or course, much more unpalatable.
Their pension policy would require a significant reduction in DB pension payments for ESB employees, Bank staff, Civil and Public Servants, Doctors, Gardaí and many others. If they were included I'd be all for it.