Says differently on the government website. Nothing about employing people and different base capital.
The government website you refer to describes minimal conditions to open limited liability company in Poland.
It does not describe conditions to receive resident permit.
Additional conditions are set out in Article 53(1)(2) of the Act on Foreigners of 13 June 2003 (Dz.U. of 2006, No. 234, item 1694, as amended), a residence permit for a fixed period may be granted to a foreigner who conducts business activity under the regulations in force in Poland, which is beneficial to national economy,
especially contributes to the increase of investment, transfer of technology, introducing beneficial innovations or creation of new workplaces
, providing that the circumstances which are the grounds for applying for a residence permit justify the foreigner's stay in the Republic of Poland for a period longer than 3 months.
I know the practise of Voivode regarding issuing of residence permit.
I hope this will clear your doubts.
By the way only Advocate can not be employed on a basis of employment contract.
In contrary Legal Advisor can be employed on a basis of employment contract.
1) Advocate (Polish: adwokat), whose main function is to provide legal assistance, prepare legal opinions and drafts of legislative acts, and represent persons before court in civil, administrative and criminal trials.
2) Legal advisor (Polish: radca prawny), whose main function is to provide legal assistance, prepare legal opinions and drafts of legislative acts, and represent persons before courts in civil, administrative and - in a limited scope - criminal trials;