The problem is, the left doesn't want a "fair share". To be fair means everyone should be paying the same rate. What the left wants is exactly the same way that it is. They want the "poor" to be excused from any tax burden whatsoever and they want most if not all the burden put on the top 1%. But they talk fairness so let's be fair. Fair would be a static % of one's income. If that were to come to pass, the wailing and gnashing of teeth would be deafening. This is why the left is so resistant to the fair tax. They claim that the rich still get off easy because it's a consumption tax. But let's look at a flat tax. Say a flat tax of 15% was imposed. Keeping things simple:
Someone earning $20,000 taxed at 15% would pay $3000 a year.
Someone earning $100,000 per year would pay $15,000 a year.
But the left won't see it this way. They would wail and gnash teeth that it's unfair that someone making $100K is paying the same tax rate as someone making $20K and their lemmings lap it up even though in reality, the person making $100K is paying 5X that of the person making $20K. Hell, someone making $40K would be paying twice that of someone making $20K. This is why yoyo won't give us a number. It's because it's not what he and his ilk want. They not only want the top earners paying more, they want some of what is being confiscated to trickle down to the lower end of the spectrum. The only true fair way to taxation is with either the Fair Tax or a flat tax.