Funny you say that as I'm the creator and mod of [email protected]

For others curious about land value taxes:

A land value tax (LVT) is a levy on the value of land without regard to buildings, personal property and other improvements.[1] It is also known as a location value tax, a point valuation tax, a site valuation tax, split rate tax, or a site-value rating.

Land value taxes are generally favored by economists as they do not cause economic inefficiency, and reduce inequality.[2] A land value tax is a progressive tax, in that the tax burden falls on land owners, because land ownership is correlated with wealth and income.[3][4] The land value tax has been referred to as "the perfect tax" and the economic efficiency of a land value tax has been accepted since the eighteenth century.[1][5][6]

LVT's efficiency has been observed in practice.[18] Fred Foldvary stated that LVT discourages speculative land holding because the tax reflects changes in land value (up and down), encouraging landowners to develop or sell vacant/underused plots in high demand. Foldvary claimed that LVT increases investment in dilapidated inner city areas because improvements don't cause tax increases. This in turn reduces the incentive to build on remote sites and so reduces urban sprawl.[19] For example, Harrisburg, Pennsylvania's LVT has operated since 1975. This policy was credited by mayor Stephen R. Reed with reducing the number of vacant downtown structures from around 4,200 in 1982 to fewer than 500.[20]

LVT is arguably an ecotax because it discourages the waste of prime locations, which are a finite resource.[21][22][23] Many urban planners claim that LVT is an effective method to promote transit-oriented development.[24][25]

Further, it can't be passed on to tenants, both in economic theory and in observed practice, and even a milquetoast LVT -- such as in the Australian Capital Territory -- can have positive impacts:

It reveals that much of the anticipated future tax obligations appear to have been already capitalised into lower land prices. Additionally, the tax transition may have also deterred speculative buyers from the housing market, adding even further to the recent pattern of low and stable property prices in the Territory. Because of the price effect of the land tax, a typical new home buyer in the Territory will save between $1,000 and $2,200 per year on mortgage repayments.

Seems like a good way to get a lot of retired folk to lose their property over taxes, as land value rises above their means

It’s like a dystopian future where you can’t own anything or have private space.

That's our dystopian, low-density present.

Yeah, they're welcome to go live in a box surrounded by crazy people - personally I'd rather be in a box six feel under than crammed in with them.

I suppose since my country is very low population but very large I don't really see the problem. Everyone could have a house here and we'd still have plenty of room to space.

Sweden has a population of 10.5 million, ish, and an area of 447k square kilometres. Germany by contrast, has a population of around 80 million, and an area of 357k square kliometres.

That said, I believe low density can work just fine. You don't need highrises to improve population storage efficiency. Simple two-three story buildings work just fine too.

You could also lower the population, something modern society is managing just fine right now anyway. I personally really don't believe overpopulation is going to be a significant problem in the long run.