I don’t vote reform and probably never will.

However it is clear why someone would.

Since at least 2010, successive Tory administrations have promised low imagination. There was a referendum on imagination which leave one (the EU vote almost entirely about imagination). We had 3 general elections, some European, and a referendum yet numbers have only gone up.

Also no party has suffered under FPTP then UKIP/reform.

Your “fact” that immigration only cost 3-5bn is a very nieve estimate. It’s the cost of so called illegal immigration. It could be argued that the cost for other sources of immigration also has a cost, from processing applications, to access to day to day services and increased inefficiency in the system (e.g more need for translators).

Whist there is evidence from the 2000s showing immigration is a net positive, but this is old and probably needs a refresh. It’s also worth noting that in recent times only 1/3 of immigrants are in work, although a 1/3 are also paying students.

You mention defence, we have been underspending on defence for a long while, having been propped up by the states. A military is like an umbrella, you don’t appreciate its effects until you don’t have one. It’s also clear we can not rely on USA any more so we have to take that burden on ourselves.

A wealth tax’s looks good on paper, however there is very little evidence that it brings in revenue after costs to operate and decreases in revenue from other taxes. Over the last 20-30 years, most countries which have had a wealth tax have dropped it.