Doesn't make sense to me. An uptick in construction work will not be an inflation balloon. More disposable income doesn't mean 1:1 more spending.
If you build a lot of (social) housing, you put at worst a lot of people a roof above their head.
Families having less financial stress might lower crime rate and improve children school scores. They might save to start businesses or find their other talents.
For some, this might be a downside tough. It makes workers more educated, healthier, more stable, less desperate and less dependent on bosses, plus they might be less angry so politically less exploitable too.