How'd they do that?
Borrow money and spend It on higher wages for teachers, hire more people in administration etc. In short words make debt and spend It on broadly understood consumption. The whole "green island" nonsense... well, check the data, growth in Poland recently has been fueled mostly by consumption - government borrow the money, give It to people, they spend It making the economy going on and PO says "look how great we are, people are getting more money, we had growth as the only country in EU", yeah but that's the way of Latin American populists, It's a matter of time when economy collaps with such policy applied. It's like taking steroids and saying "look how great my body is" when in fact It is being ruined. What's worst, It will be very difficult to stop this madness now, If teachers got the highest ever rises of wages during the crisis then It will be extremely difficult to cut them after the crisis is over.
PiS wanted to spend their way out of the crisis, PO didn't.
Nonsense. It's a lie spread by PO propagandists. Both Lech and PiS were talking about It in late 2008, when the crisis was spreading world wide but Rostowski (the guy who had the best info about real situation of public finances) was literally screaming that budget is in excellent conditions (until he couldn't hide the truth anymore) and what we can expect is at worst some mild and short slowdown... so they said, ok let's spend some more money on public investment (i.e. a building of court in town x was planned to be renovated in 2 years, let's do it now) to stimulate the economy and avoid that short slowdown -> one can agree with that approach or not but It surely is included in the area of mainstream theory of economy. When the truth came out about the financial situation of Poland, they never again proposed such things, instead they have heavily criticized the government for too high deficit since then.
Anyway, the cuts will come, and they'll affect many of the PiS supporters. No bad thing.
No, the rises of taxes are coming. We got to the point, when PO people start blaming Kaczynski for the huge deficit because he... lowered the taxes. What's more, these fools are drilling for money everywhere. Polish energy sector badly need huge investments - the cost is estimated at around 100 billion... what's government do ? Take away the money from this sector into the budget. We already have one of the highest electricity prices in EU and If that 100 billion will have to be paid by electricity consumers, not only households but also business will suffer huge loses. These fools make Hugo Chavez look like a follower of Adam Smith.
Who said anything about Lech?
You say Jaro wasn't arrested because of the father's protection... so why didn't he protect Lech too ? I think even majority of these "intelectually superior" PO voters would notice a lack of logic (to put it mildly) in this reasoning.