A lot of people think it will be impossible for President Obama to keep his promise not to raise taxes on families making more than $250k/year. I'm not one of those people. I just don't think the promise is very meaningful.
To see what I mean, take a look at the Senate version of the health care bill. It includes a tax on insurance companies that offer high-cost, high-value insurance plans.
In response to that tax, insurers will have three options: (1) stop offering such plans altogether; (2) continue to offer them (as long as they make money), but pass the costs on to their customers; and (3) continue to offer them (as long as they make money), and just eat the added costs.
Of course, no one knows for sure what choice insurance companies will make. Undoubtedly, different companies will respond differently. But if you had to guess, a smart guess would be that ALL companies would seek to jointly maximize: (a) their profits; and (b) the amount of the tax costs they can pass on to customers. In other words, they'll keep passing along the tax costs until doing so begins to eat into their profits.
Employers, as the country's biggest purchaser of insurance policies, will bear the immediate brunt of the cost pass-through. But they--just like the insurance companies--have a bottom line to watch and owners/shareholders to take care of, so they'll seek some insulation from the cost increases, too. There are lots of ways they can do this: restrict other benefits, limit wage growth, hire fewer people, fire more people, reduce hours, require employees to pay more for their health care, downgrade to a less expensive medical plan, etc.
People who work for these employers (or who might have worked for them had not the employers' costs just gone up), and individuals who purchase insurance on their own are at the bottom of the proverbial hill down which all of this shit flows. They are the ones who will end up bearing most of the costs in terms of restricted benefits, limited wage growth, job loss, reduced hours, greater out-of-pocket costs, reduced plan quality, etc. In other words, they are the ones who, at the end of the day, will have effectively financed the tax on insurers. But because the tax was just that--a tax on insurers rather than families and individuals--the Obama administration will be able to say that it kept its $250k promise.
Now you see why the important issue is not whether the administration keeps its promise, but whether the promise actually ends up meaning anything.
Footnote: By the way, this isn't only applicable to health care. The administration can raise an essentially unlimited amount of revenue by taxing entities that ultimately will pass those tax increases onto individuals and families. That's how a value-added tax would work, how the permits under cap-and-trade would work, and so on. The government treats business as its piggy bank, and business treats you the same way. When you get angry, the government says, "Don't look at us. We didn't raise the cost of your new TV or that bag of groceries. That was mean old Big Business." But business was just responding rationally to what government did do.