It's close to tax reporting due date. God knows how I hate tax. That silly "progressive" income tax. In addition to being the cruelest income cutter, progressive tax is also the meanest disincentive to work hard(er). Think about it. From kindergarten to high school to college to wherever, we are told: work is good. But Tax thinks otherwise. According to Tax, working is sinful. And a sin should be punished. That's why once you have a job and get paid, you are punished. You have to pay tax. Worse yet, the more you work, the more severe your punishment is. (They give this system a cute name: "progressive").
I always think this idea of "progressive" system is dull (not only in taxation, but in anything). Same fraction (in percentage) of different levels of income should already take care of the differences. It should be "fair" therefore to take (for some legitimate purpose; development for example) 5% from a person with Rp 2 million monthly income and 5% from a person with Rp 20 million. It's not fair to, say, charge the former 5% and the latter 10%. Because at 5% for each, the absolute amounts should already take care of the difference: the richer one pays a lot higher (Rp 1 million) than the poorer one (Rp 0.1 million). "Progressive" tax, on the other hand, orders the richer to pay Rp 2 million. You call this "fair"?
Of course there's all legitimation for tax. Development (esp. welfare state) needs money from taxing the people. Fine. I'm not saying there shouldn't be any tax whatsoever. But income tax has to be in a flat rate. Not like that "progressive" tax. (The system of zakat is more fair, for that matter). Of course flat rate system only addresses the issue of "fairness". As for being a disincentive to work, any kind of income tax is.