Wealth redistribution is the primary function of a modern developed world government.
It's the means by which the money is caused to circulate, when it would otherwise pool in a few places, rendering it useless.
Money is a signal - a universal, multipurpose
Kanban - that tells an economy what it needs to do. If the signals all say "provide for Warren Buffet" and none say "provide for Joe Lunchpail", then the system will break down, and the large numbers of Joe Lunchpails will stop using the economy to provide for their needs, and use other means - such as theft and robbery; or will develop their own economies (black markets); or more likely, a combination of all three.
Ideology has fuck all to do with it - it's best for everyone (including the wealthy) for the government to take some of the money from the rich and give it to the poor. The only questions are how much of this to do to get the optimum results for everyone, and the details of the tax structure and benefits structure that are employed.
Of course, the big problem is that people don't treat money as a signal; they rather foolishly regard it as property - leading to the erroneous conflation of taxes with theft.
But then, I never said people were very clever.
Can you explain "money as a signal" - do you mean as a way to track wealth?
No, as a way to tell producers what to make, and how much.
If you own a Zinc mine, how do you decide how much ore to extract and process each year? In the absence of money as a signal, there's no difference between employing a dozen miners and making the ore body last a millennium, and employing a million miners and getting out all of the ore in a week.
Money is a signal that tracks the relationship between costs and sales. The more ore you process, the higher your labour costs, and the lower the price you can charge for the finished zinc ingots. And how do the miners decide to take your job, rather than work for the lead miner down the road?
It's very complex - there are millions of goods, and millions of jobs; How do we decide how many zinc miners we need; how many lead miners; how many hotdog salesmen and dog meat packers and people who put little balls of cotton wool into the top of medicine bottles we need? The Soviets tried to separate money from economic signalling, and just told factories how much stuff to make based on calculations made by a central planning agency; and it was a disaster. But money automatically solves these riddles - you aim to maximise profits, your workers chose to work for the guy who is paying the best wages. And magically, the application of these signals across every commodity and workplace on the planet prevents shortages. If a commodity is in short supply, up goes the price, and producers have an immediate incentive to increase production. If there's a glut, the price collapses, and producers are incentivised to make less stuff.
The problem is that money tends to collect in a few hands, leading to an economy that favours making the things rich people demand, instead of making things that most people demand.
Redistribution allows poor people to signal their needs to the market. It's absence leads to needless want.
We generate enough food for everyone; people only go hungry when redistribution is inadequate.