Beatles Song the Fourth:

"Taxman".

People mostly associate the Beatles with Flower Power and hippieness and so on and so forth, possibly because the Beatles are so indelibly associated with the 60s and the 60s with leftist idealism among (most of) the young and reaction against it among (most of) the powers-that-were. (Viz., "Never trust anyone over thirty" and "The sign said 'Long-haired freaky people need not apply.'", respectively.)

But the truth, as always, is more complicated, and in 1965 George Harrison was ready for a little less in the way of redistributive socialism in England. Specifically, he was really not all that fond of a 95% marginal tax rate on his income. So he wrote a song about it. (Just to prove he wasn't taking sides, he name-checks both Mr. Harold Wilson and Mr. Edward Heath, leaders of the Labour and Conservative Parties, respectively.)

I play this song every April 15th. I'll bet a lot of people do.