Institute for Fiscal Studies back Land Value Tax in their Green Budget.

I like the IFS. When Labour were in charge, they were seen as right wing, now that the Tories are in charge, they are seen as left wing. In truth they are completely neutral, they just crunch numbers.

The Guardian has done a very favourable write-up of IFS Green Budget Chapter 8:

The idea is to cut income and business taxes while introducing a land value tax to end our obsession with property and to encourage paid work... the Institute for Fiscal Studies has thrown its weight behind OECD proposals for a shift away from income taxes to consumption [wot?] and wealth taxes (1)... The OECD has proposed cutting income taxes and business taxes across its developed world membership and introducing a land value tax (LVT) to end this obsession with property and encourage paid work...

The bankruptcy of the Liberal Democrat plan to raise the personal allowance threshold to £10,000 is that it seeks to impose a higher burden on middle income earners within the same tax structure. If their mansion tax illustrates a desire to tax wealth (1), like the IFS, they should switch to an LVT. Almost anyone with a mansion can void the current charges on its sale: a higher tax makes no difference. An LVT is unavoidable.

1) For the umpteenth time, LVT is not a wealth tax. Wealth taxes are bad taxes in principle and in practice (they never raise much money) and LVT is a user-charge, but let's gloss over that.
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Inevitably, there are some cracking 'Killer Arguments Against LVT, Not' in the comments:

Nofluer: When a government imposes a land value tax, aka "property tax" the government becomes the real owner of the land with the "owner" who bought the land becoming the equivalent of a renter, and the tax represents their rent payment to the government. If the tax is not paid, the "owner" is evicted by the government... which has become the REAL owner of the land. Imposition of property / LVT is confiscation of wealth without compensation.

In addition, imposing an LVT takes away land as a secure investment option for the lower classes. Whether the value/price of land goes up or down, if the owner has completely paid for the land, they can always live there (rent free) and probably grow food there.

The imposition of an LVT is another step toward the enslavement of the masses.

All of which can be neatly thrown back in his face thusly:

When a government imposes income tax aka "corporation tax", the government becomes the real owner of labour or business with the "worker" who does the work or the "entrepreneur" who built up the business becoming the equivalent of a slave, and the tax represents their tribute to the government. If the tax is not paid, the "worker" or "entreprenuer" is evicted by the government... which has become the REAL owner of the means of production. Imposition of income tax/corporation tax/VAT/NIC is confiscation of wealth without compensation.

In addition, imposing income tax takes away half the income of the working and middles classes. When incomes go down, the government just increases tax rates. Even if the worker or entrepreneur has paid for his own training or all the set-up costs, they cannot keep all their incomes (tax free) and use it to pay for essentials.

The imposition of income tax is the final step toward the enslavement of the masses by landowners, bankers and governments.
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More discussion over at HPC.