It used to be even more weird. About 20 years ago, when our kids were small, I was simultaneously in two groups:
1) High income: My personal gross income was among the top 20 % of earners. Thus, high taxes.
2) Poverty: My family's net income after housing expenses was below the threshold of the last-resort income support.
All it took was having three small children, wife not working as the youngest was a newborn thus only the minimal maternity allowance, Helsinki region housing costs and the progressive taxation of "high earners".
The way to get out of it was to take a job abroad for a while. But Finland is my home, even if I hate some parts of the welfare state politics, so I came back.