Consider that the average inflation rate is 3-4%/year[1][2], and houses generally tend to increase in value at roughly the same rate as inflation[3]. Thus, your property taxes are expected to get cheaper in real cost every year, assuming the housing market is relatively stable.
Of course, in SV, the situation is much much worse than this, because housing prices have grown much faster than inflation due to the booming economy.
And 2%/year increase isn't inconsequential.