How are you coming to the conclusion that it will run dry? For example, in the US, arguably the most prosperous period here was in the first half of the 1900s. It is when Roosevelt's New Deal went into place and the US experienced extraordinary growth and prosperity. Do you know what also coincided with this? The marginal income tax rate. From wikipedia:

> For tax years 1944 through 1951, the highest marginal tax rate for individuals was 91%, increasing to 92% for 1952 and 1953, and reverting to 91% 1954 through 1963.

Since that time, the income tax rate has declined, especially for the higher brackets. From my perspective, it kinda just sounds like wealthy people got greedy and they were able to advocate for income tax changes. Back then, they couldn't pull as much funny business as they do today with high compensation modalities ($1 trillion for Musk?) so they opted for marginal tax rate reduction. But there's no evidence from what I can see that the the money was about to "run dry." Quite the opposite it seems. Even in nordic countries, the money is not "running dry". They have great support systems in large part because of the high marginal tax rates.

Consider what would happen if the tax rate was 100% across all tax types, and you'll probably see then how there's an upper limit to how much tax revenue can be raised by a government. Would you get up and go to work if you got to keep 0% of your earnings? How about if you got to keep 1% of them? 2%?

Surely we can agree that there is a threshold, even if we don't agree where that threshold is. That's all there is to the point I'm trying to make: tax resources are limited and therefore all governments must ultimately allocate those limited resources and cannot simply spend unlimited amounts on any "good" projects that they'd like.