Right now we have lots of income tax, but most countries have very low land value tax/property tax. This means you don't "own" all the fruits of your labour, but you "own" land, which derives its value from the labour of society as a whole around the land.

The Georgist proposal is that you should own all the fruit of your personal labour (no income tax) but that the proceeds of the labour of society should be returned to society at large, through a land value tax that captures the rental value of the land.

The current status quo in most countries is that you can own a piece of land in the middle of a metropolis and do no labour, and yet reap significant reward. This is in essence a theft from society, as the citizens of the metropolis are labouring and building capital that creates value for the piece of land, yet the land-owner proportionally does very little to create value for their land. If you want to discourage theft and encourage keeping the fruits of your labour, the Georgist proposal is fantastic.