You have to be seriously geeky to get excited when the Internal Revenue Service releases a new batch of statistics. Well, I’m a big geek; like quite a few other people who work on policy issues, I was eagerly awaiting the I.R.S.’s tax tables for 2013, which were released last week.

And what these tables show is that elections really do have consequences.

You might think that this is obvious. But on the left, in particular, there are some people who, disappointed by the limits of what President Obama has accomplished, minimize the differences between the parties. Whoever the next president is, they assert — or at least, whoever it is if it’s not Bernie Sanders — things will remain pretty much the same, with the wealthy continuing to dominate the scene. And it’s true that if you were expecting Mr. Obama to preside over a complete transformation of America’s political and economic scene, what he’s actually achieved can seem like a big letdown.

But the truth is that Mr. Obama’s election in 2008 and re-election in 2012 had some real, quantifiable consequences. Which brings me to those I.R.S. tables.

For one of the important consequences of the 2012 election was that Mr. Obama was able to go through with a significant rise in taxes on high incomes. Partly this was achieved by allowing the upper end of the Bush tax cuts to expire; there were also new taxes on high incomes passed along with the Affordable Care Act, a.k.a. Obamacare.