More people earn minimum wage than before.

I am sure stats are available for other provinces and countries, but in Ontario in 1997 one in 40 people was earning minimum wage.  Today it is one in eight:
http://www.huffingtonpost.ca/2015/06/15/ontario-wages-earnings-ccpa_n_7587844.html

Who is going to boost the economy by buying all the things?

The Dollarama bubble won't burst yet.