Problem.... Anyone on social assistance does not pay income tax.
I agree. But not every policy must be a panacea for every ill. The policies I'd proposed above would help at least the working poor.
As for those not working, even if there is no tax increase, or even a tax de-crease overall, we could stil get enough money to help the poor:
1. Language policy reform. According to various research, the world is currently spending trillions of dollars annually on English-learning, translation, interpretation, etc. Professor Francois Grin, a language economist at the University of Geneva, proposed that switching the world to an easier language coud save the EU alone 25 billions euros on second-language lerning alone. THis does not include savings on translation, interpretation, etc., nor does it include savings in other parts of the world.
2. Sharing a common world military froce could allow the world to demilitarize considerably, again freeing up funds to help the poor.
3. Sharing a world currency could bring the cost of imports down worldwide, cost that are artificially high owing to money-brokers skimming off the top.
4. Promoting common citizenship at least between nations with common currencies would save much money on embassies, visas, immigration departments, customs, etc. They'd still be needed possibly, but their work would be considerably diminished.
All of these could either free up tax dollars or bring costs of production down.
Though I have nothing against making the rich pay their fair share to help the poor, it doesn't have to be through the government necessarily, and it doesn't have to be the sole solution we depend on. Making government more efficient and streamlined is another source of money to help the poor too.
In communities with community gardens, the unemployed could also earn their assistance by working in these gardens. They'd love it. If I were on assistance, the last thing I'd want is for someone to just throw money at me. I'd want to earn that assistance somehow, and we owe the poor to give them that chance to earn their assistance. Looking at it that way, to just throw money at them coud be viewed as cruel in some respects. They do have a right to the dignity of a job, even if the salary is low. Even those on social assistance shoudl be given an opportunity to earn it if they want to. Give them volunteer opportunities if there are no jobs available yet or if they lack references, etc. If something blocks them from even volunteer work, such as lack of references, etc. (yes, some volunteer agencies need references), then we help them surmount this so that they can do volunteer work through which to gain the references needed.
Everyone has a right to work. We might not have a right to wealth, but we all have a right to work.