"Indonesia's economy has improved a lot, but there's no balance," said Irwan Hidayat, the chief executive of SidoMuncul, a large manufacturer of herbal drinks.
"There's no balance between cities and rural areas, no balance between rich and poor.
That's why mudik keeps getting bigger every year."
In the 1990s, SidoMuncul
became the first company to sponsor organised mudik convoys for its employees.
This year, said Irwan
, 63, the company had chartered about 300 buses to send home more than 20,000 vendors of its products.