I'm a married male with children, and this is bullshit. I recall at my first job my manager saying, "Yeah, tax the hell out of you young single rich guys". The state should have no discriminatory power of taxation w/regard to marital/reproductive status. If anything, young single people should be taxed less, as they are a lower draw on social services and are more likely to deploy capital rather than save.
Tax rates are set based on a person's ability to pay, not on their expected use of social services. You could argue that this discriminates against young wealthy singles, but then you'd effectively be arguing that the impoverished or the chronically ill should pay proportionately higher taxes because they are more dependent on the state for their day-to-day wellbeing. The problems with this position should be obvious.
We're entering the area of considering charity vs. penalty. The current system penalizes those that have no need of charity doubly. Not only do they have to subsidize those more dependent upon the system, but they are penalized on top of that with more taxation. The problem with that situation should be obvious, as well.
