I would like to tell about some more practical things like payment and labor union.
There is no laws about least-payments in Denmark
In Denmark you have the right for 5 weeks of vacation due to legislation but most collective agreements ensure the right for 5 more days of vacation. In many cases with full salary.
Paid sick days
When sick most Danes are ensured 100% full salary in the first many days due to the collective agreements. As an example the collective agreement for the industry ensures 9 weeks of full salary if case of sickness. Without a collective agreement you may follow the state provisions for payment during sick days with a lower payment.
Extra saving for pension
All pensionists receive the state pension but the collective agreements ensure an extra saving for pension at 11-12% of the salary each month for most Danes - on the top of the state pension. This ends up as a substantial sum after a long life on the labour market.
Paid leave for new mothers and fathers
For new mothers and fathers the collective agreements ensure about 6 months of leave with salary. An example is the collective agreement for employees in shops. It ensures the mother full salary during 14 weeks for the new mother leave plus 4 weeks leave before giving birth. The father has the right of 2 weeks of leave. All this with 100% paid leave. Further the parents have the right to 13 weeks of parents leave with salary. Thereby the collective agreements ensure new parents better conditions than provided by the state.