The statement you make is false. Delphi is not particularly more easy to decompile than code produced by other mainstream compilers.
- For .net languages there is Reflector.
- C++ is covered in this Stack Overflow question.
- Python/Perl/Ruby etc. are interpreted.
If you were able to prove that the results of decompiling a Delphi executable were of significantly higher quality than in other widely used languages then your question would carry more weight.
