The "War on Poverty" was a vote bribing system and it was created precisely because Liberal Republicans pushed through the 24th amendment that removed all requirements to pay taxes.
The whole thing is about money. It's about federal spending programs that route money through the hands of liberals (handling these programs) and thereby enrich them.
Once you remove the tax paying requirement, it becomes a very workable idea to bribe non taxpayers with government money so that they will keep voting for those people who advocate spending government money.
The war on poverty program successfully flipped the Black vote from mostly Republican to overwhelmingly Democrat, because who would be against free money?
And that was it's intent from the beginning.