If you want to help the poor in the long run, you can't just pay them more money for the same work, you have to find ways to make their labor worth more.
"we'll have to take away your pay bump and any hopes for better pay, because the market decided you're not actually worth it"
"our billion dollar/year company can't afford to pay more without increasing prices for end-consumers"
A thing's value is the what two people agree to transact for.
A thing's value isn't dome statistical hand wave. It's a statement of fact. A dependent variable with a huge multiplicity of inputs.
If a laborer is not will ing to sell their time, which arguably, a great deal of American laborers probably shouldn't be right now given the rates many employers are offering and exploitive business models in use, Then the value is not defined.
Businesses can essentially name their price because there is a capital management complex that overall colludes to create an emergent that as a happy side effect for the actors within, leads to members being generously enriched.
The glorious absurdity to it all though, is that group is in part primarily empowered by us The enemy here, is us.
You can't escape basic economics. The supply of low skill labor is vastly greater than the demand, ergo real wages are low. The supply of housing is vastly smaller than demand, ergo real rents are high.
Raising billions from the rich on the other hand might
I'm not sure what metric you're using, but most of them don't work that way (percentiles, etc generally have an equal number in the top and bottom. I wouldn't call the bottom 80% the bottom - and that's not where the impact is. The outsized impact I'm talking about is in the bottom 25%. Those are the people seeing the brunt of it. Me being in the 80% as a software dev isn't nearly the same.
$15/hr is a problem? Let's be honest, McDonalds isn't scheduling full time. They would make maybe $22k per year at 30 hours a week. Now subtract taxes, gas, car insurance, etc. Look back at real wages and see where that falls.