Argumentative Essay - Is multiracial diversity a strength or a weakness?

As Singapore develops further, there are more people migrating in because of the clean and green environment, great tourist attractions and many job opportunities. This leads to a multiracial diversity in Singapore. I believe that this is a weakness for the country. 

As there are more people migrating in, there would be more foreign talent in Singapore which would not be able to give Singaporeans a chance and opportunity to show and prove what they are capable of doing. Therefore, as time goes by, the country would have too many foreigners who have stable jobs unlike the Singaporeans. I believe that the opportunities should be given to the Singaporeans as citizens of the country.