Statement:
In Australia, the tax system is simpler than in Spain

In the Tax Competitiveness Index rating Australia holds position #9 ²⁰²¹ out of 37 and Spain is #30 out of 37 ²⁰²¹.
Position of Australia is better than position of Spain.

Referencies:

1. Tax Competitiveness Index ²⁰²¹ by Tax Foundation

   The countries in the rating sorted by 'Overall Score' in descending order.

   Australia	'Overall Score' value is	71.3
   Spain	'Overall Score' value is	57.1