These cards are, at best, stretches for white and some outright color breaks. Overall, color aside, the effects are good, but they need to be mostly blue or red rather than white.
Counterspells have always been a bend in white - Planar Chaos cards are never to be taken as a examples of what a color can do -, so your counters are a stretch. Treasure tokens are usually more of the red/blue thing and white doesn't ramp, so those are definitely a break. Emminent Domain and Manifest Destiny are definitely breaks. Tax man is close but still a stretch because of the amount it ramps and Tithe Collector is solidly a red card, not white.
Uh... I think that's kind of the "joke".
The thought that other colors continually impinge upon white's small slice of usable color pie and that white should expend upon the few small areas where it is good in EDH (countering spells because it's technically the second best color at doing so, creating treasures just because smothering tithe exists, etc.) is a very worn and counterproductive line of thought. Most recently, people have been yelling at how Hullbreacher or Archelos should have been white.
I honestly can't tell if the bitter humor is directed at wanting white to have a larger slice of the pie or is directed at homebrewers who think that turning dockside extortionist white is a valid method for fixing white.