Labor is in theory infinitely expandable. Capital is infinitely expandable. Land (and natural opportunities) is fixed in supply, so according to Georgists there is no moral argument for favoring somebody for its monopolization. It should be community owned and rights of use to it should be given out to people, priced by a market mechanism.
Labor and capital don't suffer from fixed supply or renewability so according to Georgists there is no need to prevent it from expanding, eg. by slapping taxes on it.
Georgist movement is also known as single-tax or zero-tax movement, because they advocate that there should be no taxes on labor, consumption or capital. The only tax implemented should be the natural monopoly tax (land value tax). They say it would be enough to finace government from it because there are crazy trillions of dollars parked in real estate. Real estate price is actually land value price (location, location, lovation), so only land tax would suffice and there is no need for property taxation, which is actually product of someone's labor.
Some Georgists say that Land Value Tax is not even a tax but a payment for exclusive rights of use. You pay for the service the government gives you directly, therefore it's not a tax. In this way they argue you can run a society with exactly ZERO taxes and paradoxically raise even more money than current tax system.